Former Democratic U.S. Representative John Conyers and his wife Monica leave following the funeral service for the late singer Aretha Franklin at the Greater Grace Temple in Detroit, Michigan, U.S. August 31, 2018. REUTERS/Rebecca Cook

Arnold Reed, attorney for U.S. Rep. John Conyers, holds up an image of Conyers and Marion Brown, one of the two women accusing the congressman of inappropriate behaviour, as he addresses the media outside Conyers family home in Detroit, Michigan, U.S., December 1, 2017. REUTERS/Rebecca Cook

Monica Conyers, wife of U.S. Rep. John Conyers, leaves the family home in Detroit, Michigan, U.S., December 1, 2017. REUTERS/Rebecca Cook

Arnold Reed, attorney for U.S. Rep. John Conyers, holds up a letter of support for Conyers from a former employee as he addresses the media outside Conyers family home in Detroit, Michigan, U.S., December 1, 2017. REUTERS/Rebecca Cook

Arnold Reed, attorney for U.S. Rep. John Conyers, addresses the media outside Conyers family home in Detroit, Michigan, U.S., December 1, 2017. REUTERS/Rebecca Cook

Arnold Reed, an attorney for U.S. Rep John Conyers, makes a statement to the media in front of Conyers family home in Detroit, Michigan, U.S., November 29, 2017. REUTERS/Rebecca Cook

Monica Conyers, wife of U.S. Rep John Conyers, closes the gates in front of the family home in Detroit, Michigan, U.S., November 29, 2017. REUTERS/Rebecca Cook

U.S. Representative John Conyers (D-MI) participates in a House Judiciary Committee hearing on Capitol Hill in Washington, U.S. July 12, 2016. Picture taken July 12, 2016. REUTERS/Jonathan Ernst

U.S. Representative John Conyers (D-MI) participates in a House Judiciary Committee hearing on Capitol Hill in Washington, U.S. July 12, 2016. Picture taken July 12, 2016. REUTERS/Jonathan Ernst

U.S. Representative John Conyers (D-MI) participates in a House Judiciary Committee hearing on Capitol Hill in Washington, U.S. July 12, 2016. Picture taken July 12, 2016. REUTERS/Jonathan Ernst

FILE PHOTO: House Judiciary Committee ranking member Rep. John Conyers (D-MI) speaks at a news conference on Capitol Hill in Washington May 22, 2014. REUTERS/Yuri Gripas

U.S. Senator Richard Blumenthal, L, (D-CT), House Judiciary Committee Ranking Member John Conyers, Jr., C, (D-MI) and Senator Pat Leahy, R, (D-VT) hold a press conference to outline the claim that U.S. President Donald Trump violated the emoluments clause of the Constitution in the U.S. Capitol in Washington June 20, 2017. REUTERS/Kevin Lamarque

Constitutional Accountability Center' (CAC) President Elizabeth Hydra speaks during a press conference along with Senator Richard Blumenthal, L, (D-CT), House Judiciary Committee Ranking Member John Conyers, Jr., C, (D-MI) and Senator Pat Leahy, R, (D-VT) to outline the claim that U.S. President Donald Trump violated the emoluments clause of the Constitution in the U.S. Capitol in Washington June 20, 2017. REUTERS/Kevin Lamarque

U.S. Senator Richard Blumenthal, L, (D-CT), House Judiciary Committee Ranking Member John Conyers, Jr., C, (D-MI) and Senator Pat Leahy, R, (D-VT) hold a press conference to outline the claim that U.S. President Donald Trump violated the emoluments clause of the Constitution in the U.S. Capitol in Washington June 20, 2017. REUTERS/Kevin Lamarque

U.S. Senator Richard Blumenthal, L, (D-CT), House Judiciary Committee Ranking Member John Conyers, Jr., C, (D-MI) and Senator Pat Leahy (R) hold a press conference to outline the claim that U.S. President Donald Trump violated the emoluments clause of the Constitution in the U.S. Capitol in Washington June 20, 2017. REUTERS/Kevin Lamarque

House Minority leader Nancy Pelosi and Rep. John Conyers take part in a discussion panel on President Trump's Muslim and refugee ban in the U.S. Capitol in Washington, U.S., February 2, 2017. REUTERS/Kevin Lamarque

Committee Chairman Bob Goodlatte (R-VA) (L) rubs his eyes as he listens to testimony by U.S. Attorney General Loretta Lynch before a House Judiciary Committee hearing on Capitol Hill in Washington, U.S. July 12, 2016. Also pictured are Representative Trey Gowdy (R-SC) (C) and Representative John Conyers (D-MI) (R). REUTERS/Jonathan Ernst

U.S. Representative John Conyers (D-MI) (L) greets President Barack Obama as he arrives aboard Air Force One at Detroit Metropolitan Wayne County Airport in Detroit, Michigan January 20, 2016. In Detroit, Obama will visit the North American International Auto Show and deliver remarks on the U.S. auto industry at the UAW-GM Center for Human Resources. REUTERS/Jonathan Ernst

Detroit Mayor Mike Duggan (L) and U.S. Representative John Conyers (D-MI) greet President Barack Obama (R) as he arrives aboard Air Force One at Detroit Metropolitan Wayne County Airport in Detroit, Michigan January 20, 2016. In Detroit, Obama will visit the North American International Auto Show and deliver remarks on the U.S. auto industry at the UAW-GM Center for Human Resources. REUTERS/Jonathan Ernst

Congressman John Conyers (D-MI) speaks at an event celebrating the 50th anniversary of the Voting Rights Act of 1965 in Washington July 30, 2015. Conyers, the oldest and longest serving member of Congress, voted on the 1965 VRA. REUTERS/Gary Cameron

U.S. members of Congress Senator Chris Coons (D-DE) (L-R), Representative John Conyers (D-MI), Senator Ed Markey (D-MA), Senator Jeff Flake (R-AZ) and Representative Charlie Rangel (D-NY) stand as they are recognized during President Barack Obama's remarks at the African Union in Addis Ababa, Ethiopia July 28, 2015. Obama toured a U.S.-supported food factory in Ethiopia on Tuesday on the last leg of an Africa trip, before winding up his visit at the African Union where he will become the first U.S. president to address the 54-nation body. REUTERS/Jonathan Ernst

Democratic presidential candidate Sen. Bernie Sanders, L, (I-VT) listens as Rep. John Conyers, R, (D-MI) speaks during their news conference to discuss the "Employ Young Americans Now Act" in Washington June 4, 2015. HOPE (Helping Other People Excel) helps students learn technology skills and find jobs in the IT field. REUTERS/Kevin Lamarque

Students listen as Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks during a news conference at The HOPE Project to discuss the "Employ Young Americans Now Act," legislation which would "invest $5.5 billion to create job training programs in underserved communities" in Washington June 4, 2015. HOPE (Helping Other People Excel) helps students learn technology skills and find jobs in the IT field.
REUTERS/Kevin Lamarque

Democratic presidential candidate Sen. Bernie Sanders, L, (I-VT) listens as Rep. John Conyers, R, (D-MI) speak during their news conference to discuss the "Employ Young Americans Now Act," legislation which would "invest $5.5 billion to create job training programs in underserved communities" in Washington June 4, 2015. REUTERS/Kevin Lamarque

Rep. John Conyers, L, (D-MI) and Democratic presidential candidate Sen. Bernie Sanders, R, (I-VT) arrive to hold a news conference at The HOPE Project to discuss the "Employ Young Americans Now Act," legislation which would "invest $5.5 billion to create job training programs in underserved communities" in Washington June 4, 2015. HOPE (Helping Other People Excel) helps students learn technology skills and find jobs in the IT field. REUTERS/Kevin Lamarque

Civil rights activist Al Sharpton (R) joins New York City Mayor Bill de Blasio (2nd L) and U.S. Representative John Conyers (D-MI) (L) for a news conference on his progressive agenda against income inequality with labor leaders and elected officials outside the U.S. Capitol in Washington May 12, 2015. REUTERS/Jonathan Ernst

U.S. Senator Patrick Leahy (D-VT) (L-R) is joined by Representative John Conyers (D-MI), Representative John Lewis (D-GA) and Representative Jim Sensenbrenner (R-WI) as they arrive to announce legislation to restore key provisions of the Voting Rights Act, struck down in 2013 by the U.S. Supreme Court, at the U.S. Capitol in Washington January 16, 2014. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS ELECTIONS)

U.S. Senator Patrick Leahy (D-VT) (2nd L) is joined by Representative John Conyers (D-MI) (L), Representative Jim Sensenbrenner (R-WI) (2nd R) and Representative John Lewis (D-GA) (R) as they announce legislation to restore key provisions of the Voting Rights Act, struck down in 2013 by the U.S. Supreme Court, at the U.S. Capitol in Washington January 16, 2014. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS ELECTIONS)

U.S. Representative John Conyers (D-MI) (R) waits in line for dinner with fellow members as he arrives for an evening meeting of the House Democratic caucus at the U.S. Capitol in Washington, September 28, 2013. The U.S. government edged closer on Saturday to a shutdown as Republicans in the House of Representatives rejected an emergency spending bill approved by the Senate and pushed instead for a one-year delay of President Barack Obama's healthcare reform law.REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS)

New York Attorney Norman Siegel smiles in his office during an interview with Reuters in New York, July 19, 2011. Siegel, who has represented relatives of victims of the September 11 2001 attacks in three legal cases, sent letters on Monday requesting meetings with FBI Director Robert Mueller, U.S. Attorney Eric Holder and U.S. Representative John Conyers, the ranking member of the House Judiciary Committee to discuss the agencies' preliminary inquiry into reports that News Corp reporters may have tried to hack the phones of 9/11 victims. REUTERS/Mike Segar (UNITED STATES - Tags: CRIME LAW DISASTER)

New York Attorney Norman Siegel is seen in his office during an interview with Reuters in New York, July 19, 2011. Siegel, who has represented relatives of victims of the September 11 2001 attacks in three legal cases, sent letters on Monday requesting meetings with FBI Director Robert Mueller, U.S. Attorney Eric Holder and U.S. Representative John Conyers, the ranking member of the House Judiciary Committee to discuss the agencies' preliminary inquiry into reports that News Corp reporters may have tried to hack the phones of 9/11 victims. REUTERS/Mike Segar (UNITED STATES - Tags: CRIME LAW DISASTER MEDIA POLITICS HEADSHOT)

New York Attorney Norman Siegel poses in his office during an interview with Reuters in New York, July 19, 2011. Siegel, who has represented relatives of victims of the September 11 2001 attacks in three legal cases, sent letters on Monday requesting meetings with FBI Director Robert Mueller, U.S. Attorney Eric Holder and U.S. Representative John Conyers, the ranking member of the House Judiciary Committee to discuss the agencies' preliminary inquiry into reports that News Corp reporters may have tried to hack the phones of 9/11 victims. REUTERS/Mike Segar (UNITED STATES - Tags: CRIME LAW DISASTER MEDIA POLITICS)

New York Attorney Norman Siegel poses in his office during an interview with Reuters in New York, July 19, 2011. Siegel, who has represented relatives of victims of the September 11 2001 attacks in three legal cases, sent letters on Monday requesting meetings with FBI Director Robert Mueller, U.S. Attorney Eric Holder and U.S. Representative John Conyers, the ranking member of the House Judiciary Committee to discuss the agencies' preliminary inquiry into reports that News Corp reporters may have tried to hack the phones of 9/11 victims. REUTERS/Mike Segar (UNITED STATES - Tags: CRIME LAW DISASTER MEDIA POLITICS)

Korean War veterans Senator Arlen Specter (D-PA) (L-R), Representative John Conyers (D-MI), Rep. Howard Coble (R-NC) and Rep. Charles Rangel (D-NY) bow their heads in prayer during a ceremony commemorating the 60th anniversary of the Korean War, at the U.S. Capitol in Washington, June 24, 2010. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS MILITARY ANNIVERSARY)

Ford Motor Co assembly worker Angela Godfrey stands up after U.S. Representative John Conyers praised the words on her shirt during a program to announce the first round of loan commitments to transform older factories at a news conference at the Ford Motor Research & Innovation Center in Dearborn, Michigan June 23, 2009. REUTERS/Rebecca Cook (UNITED STATES TRANSPORT BUSINESS)

U.S. Representative John Conyers addresses the audience during a program to announce the first round of loan commitments to transform older factories during a news conference at the Ford Motor Research & Innovation Center in Dearborn, Michigan June 23, 2009. REUTERS/Rebecca Cook (UNITED STATES TRANSPORT BUSINESS)

Committee chairman Rep. John Conyers (D-MI) holds a House Judiciary Committee hearing on the George W. Bush presidency, called "Executive Power and Its Constitutional Limitation", on Capitol Hill in Washington, July 25, 2008. REUTERS/Jonathan Ernst (UNITED STATES)

Former White House Press Secretary Scott McClellan (L) is escorted by committee chairman US Rep. John Conyers (D-MI) (R) as he arrives to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES)

Former White House Press Secretary Scott McClellan (R) walks with committee chairman US Rep. John Conyers (D-MI) (L) as he arrives to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES)

Former White House Press Secretary Scott McClellan (R) walks with committee chairman US Rep. John Conyers (D-MI) (2nd L) and attorney Michael Tigar (TOP L) as he arrives to testify about his comments about the Bush administration's run-up to the Iraq war from his book before the House Judiciary Committee on Capitol Hill in Washington, June 20, 2008. REUTERS/Jonathan Ernst (UNITED STATES)

Melissa Bell (R), mother of Jena 6 defendant Mychal Bell, and Reverend Al Sharpton listen to questions after a meeting with House Judiciary Chairman John Conyers about the case of the Jena 6 defendants on Capitol Hill in Washington, September 25, 2007. REUTERS/Jim Young (UNITED STATES)

Reverend Al Sharpton (2nd R) and Melissa Bell (2nd L), mother of Jena 6 defendant Mychal Bell, are escorted through the halls of Capitol Hill after a meeting with House Judiciary Chairman John Conyers about the case of the Jena 6 defendants on Capitol Hill in Washington, September 25, 2007. Following behind is Rep. William Jefferson (D-LA).REUTERS/Jim Young (UNITED STATES)

House Judiciary Chairman John Conyers (D-MI)(L) speaks about a meeting regarding the case of the Jena 6 defendants with Reverend Al Sharpton (2nd R), on Capitol Hill in Washington, September 25, 2007. Listening in are Melissa Bell (R), mother of Jena 6 defendant Mychal Bell, and Martin Luther King III. REUTERS/Jim Young (UNITED STATES)

Reverend Al Sharpton (L) speaks about a meeting with House Judiciary Chairman John Conyers (D-MI) (R) to ask for formal hearings about into the justice system in Jena, Louisiana and the case of the Jena 6 defendants, on Capitol Hill in Washington, September 25, 2007. Listening at center in Melissa Bell, mother of Jena 6 defendant Mychal Bell. REUTERS/Jim Young (UNITED STATES)

Reverend Al Sharpton (L) speaks about a meeting with House Judiciary Chairman John Conyers (D-MI) to ask for formal hearings about the justice system in Jena, Louisiana and the case of Jena 6 defendants on Capitol Hill in Washington, September 25, 2007. REUTERS/Jim Young (UNITED STATES)

Peace activist Cindy Sheehan takes part in a march to deliver over 1,000,000 signatures to Congressman John Conyers appealing to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney in Washington, DC, July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES - Tags: POLITICS) BEST QUALITY AVAILABLE

Supporters of the Iraq war rally across the street from peace activists, who are taking part in a march to deliver more than 1,000,000 signatures to Congressman John Conyers in an appeal to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney, in Washington July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES)

Peace activists take part in a march to deliver over 1,000,000 signatures to Congressman John Conyers appealing to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney in Washington July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES)

A peace activist flashes a peace sign and holds up a banner with names of U.S. soldiers killed in Iraq during a march to deliver more than 1,000,000 signatures to Congressman John Conyers, appealing to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney, in Washington July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES)

Peace activist Cindy Sheehan takes part in a march to deliver more than 1,000,000 signatures to Congressman John Conyers, appealing to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney, in Washington July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES)

Peace activists take part in a march to deliver more than 1,000,000 signatures to Congressman John Conyers, appealing to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney, in Washington July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES)

Peace activists take part in a march to deliver more than 1,000,000 signatures to Congressman John Conyers, appealing to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney, in Washington July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES)

Peace activist Cindy Sheehan takes part in a march to deliver more than 1,000,000 signatures to Congressman John Conyers, appealing to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney, in Washington July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES)

Peace activist Cindy Sheehan takes part in a march to deliver more than 1,000,000 signatures to Congressman John Conyers, appealing to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney, in Washington July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES) For best quality see GM1E64R0SAK01.

With witness Harriet Miers absent, members of the subcommittee on commercial and administrative law and their aides confer before the start of a hearing about the controversy over the firing of nine U.S. attorneys last year on Capitol Hill in Washington July 12, 2007. At center is Representative Linda Sanchez (D-CA), chairwoman of the subcommittee and standing behind her is House Judiciary Chairman John Conyers (D-MI). U.S. President George W. Bush claimed executive privilege on Monday to shield former White House political director Sara Taylor and Miers from having to testify to Congress about the dismissals. REUTERS/Kevin Lamarque (UNITED STATES)

Former U.S. Justice Department White House Liaison Monica Goodling (C) and her attorney John Dowd (L) speak with House Judiciary Committee Chairman John Conyers (D-SC) on Capitol Hill in Washington, May 23, 2007. REUTERS/Jim Young (UNITED STATES)

U.S. Attorney General Alberto Gonzales meets with House Judiciary Committee Chairman Rep. John Conyers (D-MI) (R) on Capitol Hill in Washington May 10, 2007. REUTERS/Larry Downing (UNITED STATES)

U.S. President George W. Bush (C) participates in the signing of H.R. 9, the Fannie Lou Hamer, Rosa Parks, and Coretta Scott King Voting Rights Act Reauthorization and Amendments Act of 2006, on the South Lawn at the White House in Washington, July 27, 2006. Joining Bush (L-R) are Rep. Melvin Watt (D-NC), Sen. Patrick Leahy (D-VT), Sen. Arlen Specter (R-PA), Rep. John Conyers (D-MI), Rep. James Sensenbrenner (R-WI), Sen. Harry Reid (D-NV) and Senate Majority leader Bill Frist (R-TN). REUTERS/Jim Young (UNITED STATES)

U.S. President George W. Bush (C) participates in the signing of H.R. 9, the Fannie Lou Hamer, Rosa Parks, and Coretta Scott King Voting Rights Act Reauthorization and Amendments Act of 2006 on the South Lawn at the White House in Washington July 27, 2006. Standing behind Bush (L-R) Sen. Arlen Specter (R-PA), Rep. John Conyers (D-MI), Rep. James Sensenbrenner (R-WI), Rep. Nancy Pelosi (D-CA), Sen. Harry Reid (D-NV) and Senate Majority leader Bill Frist (R-TN). REUTERS/Jim Young (UNITED STATES)

U.S. President George W. Bush (C) participates in the signing of H.R. 9, the Fannie Lou Hamer, Rosa Parks, and Coretta Scott King Voting Rights Act Reauthorization and Amendments Act of 2006 on the South Lawn at the White House in Washington July 27, 2006. Standing behind Bush are (L-R) Sen. Patrick Leahy (D-VT), Rep. Adam Putnam (R-FL), Sen. Arlen Specter (R-PA), Rep. John Conyers (D-MI), Rep. James Sensenbrenner (R-WI), Rep. Nancy Pelosi (D-CA), Senate Minority leader Harry Reid (D-NV), and Senate Majority leader Bill Frist (R-TN). REUTERS/Jim Young (UNITED STATES)