U.S. Representative Steve King (R-IA) (R) talks to Hector Salamanca Arroyo about immigration before the arrival of U.S. Republican presidential candidate Donald Trump for a meeting with local residents in Winterset, Iowa June 27, 2015. Salamanca Arroyo came to the United States on a tourist visa at the age of two and is a member of Iowa Dreamers, an advocacy group for young undocumented immigrants.    REUTERS/Brian Frank

Relatives separated by deportation and immigration meet at the border during a reunification event named "#Hugs Not Walls" at the banks of the Rio Bravo, a natural border between U.S. and Mexico, January 28, 2017. REUTERS/Jose Luis Gonzalez

Relatives separated by deportation and immigration cross over the water to meet at the border during a reunification event named "#Hugs Not Walls" at the banks of the Rio Bravo, a natural border between U.S. and Mexico, January 28, 2017. REUTERS/Jose Luis Gonzalez

Relatives separated by deportation and immigration, their feet covered with plastic bags, meet at the border during a reunification event named "#Hugs Not Walls" at the banks of the Rio Bravo, a natural border between U.S. and Mexico, January 28, 2017. REUTERS/Jose Luis Gonzalez

Relatives separated by deportation and immigration meet at the border during a reunification event named "#Hugs Not Walls" at the banks of the Rio Bravo, a natural border between U.S. and Mexico, January 28, 2017. REUTERS/Jose Luis Gonzalez

Relatives separated by deportation and immigration cross over water to meet at the border during a reunification event named "#Hugs Not Walls" at the banks of the Rio Bravo, a natural border between U.S. and Mexico, January 28, 2017. REUTERS/Jose Luis Gonzalez

Relatives separated by deportation and immigration cross over water to meet at the border during a reunification event named "#Hugs Not Walls" at the banks of the Rio Bravo, a natural border between U.S. and Mexico, January 28, 2017. REUTERS/Jose Luis Gonzalez

A Palestinian family meets their driver after the father was detained for hours at George Bush Intercontinental Airport in Houston, Texas, U.S., January 28, 2017. REUTERS/Trish Badger

A Palestinian family meets their driver after the father was detained for hours at George Bush Intercontinental Airport in Houston, Texas, U.S., January 28, 2017. REUTERS/Trish Badger

Iranian citizen and U.S green card holder Cyrus Khosravi (R) meets his niece, Dena Khosravi (C), 2, for the first time while greeting his brother, Hamidreza Khosravi (L), after they were detained for additional screening following their arrival to Seattle-Tacoma International Airport to visit Cyrus, during a pause in U.S. President Donald Trump's travel ban in SeaTac, Washington, U.S. February 6, 2017. REUTERS/David Ryder

Iranian citizen and U.S green card holder Cyrus Khosravi (R) meets his niece, Dena Khosravi (L, bottom), 2, for the first time while greeting his brother, Hamidreza Khosravi (L, top), after they were detained for additional screening following their arrival to Seattle-Tacoma International Airport to visit Cyrus, during a pause in U.S. President Donald Trump's travel ban in SeaTac, Washington, U.S. February 6, 2017. REUTERS/David Ryder

U.S President Donald Trump speaks during a meeting about the Supreme Court at the White House in Washington, U.S., February 9, 2017. REUTERS/Kevin Lamarque

FILE PHOTO - U.S. President Donald Trump is seen during a meeting in the Oval Office of the White House in Washington, U.S. on February 8, 2017. REUTERS/Joshua Roberts/File Photo

U.S. President Donald Trump speaks during a meeting about the Supreme Court at the White House in Washington, U.S., February 9, 2017. REUTERS/Kevin Lamarque

An anti-Trump sign is seen before the start of town hall meeting being held by Thomas Homan, acting director of enforcement for ICE, begins in Sacramento, California, U.S., March 28, 2017. REUTERS/Stephen Lam TPX IMAGES OF THE DAY

Immigrant supporters protest duirng the Los Angeles City Council ad hoc committee on immigration meeting to discuss the city's response to threats by the Trump administration to cut funding from Los Angeles and other jurisdictions which federal officials say are providing sanctuary to illegal immigrants arrested for crimes, in Los Angeles, California, U.S., March 30, 2017. REUTERS/Lucy Nicholson

Immigrant supporters protest during the Los Angeles City Council ad hoc committee on immigration meeting to discuss the city's response to threats by the Trump administration to cut funding from Los Angeles and other jurisdictions which federal officials say are providing sanctuary to illegal immigrants arrested for crimes, in Los Angeles, California, U.S., March 30, 2017. REUTERS/Lucy Nicholson

Immigrant supporters protest during the Los Angeles City Council ad hoc committee on immigration meeting to discuss the city's response to threats by the Trump administration to cut funding from Los Angeles and other jurisdictions which federal officials say are providing sanctuary to illegal immigrants arrested for crimes, in Los Angeles, California, U.S., March 30, 2017. REUTERS/Lucy Nicholson

U.S. President Donald Trump (R) meets with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump talks to the media during his meeting with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump talks to the media during his meeting with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump talks to the media during his meeting with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump (R) meets with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump talks to the media during his meeting with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump (R) listen to James Shaw during his meeting with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump talks to the media during his meeting with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas TPX IMAGES OF THE DAY

U.S. President Donald Trump meets with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump meets with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump meets with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

Sabine Durden holds a box with ashes of her son during immigration crime victims meeting with U.S. President Donald Trump at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump (L) meets with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

Sabine Durden (L) speaks holding a box with ashes of her son during immigration crime victims meeting with U.S. President Donald Trump at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

Sabine Durden (L) holds a box with ashes of her son during immigration crime victims meeting with U.S. President Donald Trump at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump listen to Michelle Wilson-Root during his meeting with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump (C) meets with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump (R) meets with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump (2nd R) meets with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump talks to the media during his meeting with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

U.S. President Donald Trump (L) meets with immigration crime victims at the White House in Washington, U.S., June 28, 2017. REUTERS/Yuri Gripas

Deferred Action for Childhood Arrivals (DACA) recipient Alejandro Villasenor, center, from Mexico receives a hug from Congressman Luis Gutierrez (D-IL 4th Dist) speaking about being a DACA recipient during a town hall meeting in Chicago, Illinois, U.S. September 14, 2017. Picture taken September 14, 2017. REUTERS/Joshua Lott

Deferred Action for Childhood Arrivals (DACA) recipients and members of the public attend a town hall style meeting as Congressman Luis Gutierrez (D-IL 4th Dist) speaks about protecting DACA recipients in Chicago, Illinois, U.S. September 14, 2017. Picture taken September 14, 2017. REUTERS/Joshua Lott

Deferred Action for Childhood Arrivals (DACA) recipient Norman Hoerdemann (L), sits with her family during a town hall style meeting about DACA recipients hosted by Congressman Luis Gutierrez (D-IL 4th Dist) speaks about protecting DACA recipients in Chicago, Illinois, U.S. September 14, 2017. Picture taken September 14, 2017. REUTERS/Joshua Lott

Congressman Luis Gutierrez (D-IL 4th Dist) listens to A Deferred Action for Childhood Arrivals (DACA) recipient speak during a town hall style meeting about protecting DACA recipients in Chicago, Illinois, U.S. September 14, 2017. Picture taken September 14, 2017. REUTERS/Joshua Lott

Deferred Action for Childhood Arrivals (DACA) recipient Alejandro Villasenorfrom Mexico poses for a portrait as he attends a town hall style meeting about DACA recipients hosted by Congressman Luis Gutierrez (D-IL 4th Dist) speaks about protecting DACA recipients in Chicago, Illinois, U.S. September 14, 2017. Picture taken September 14, 2017. REUTERS/Joshua Lott

Deferred Action for Childhood Arrivals (DACA) recipient Miguel Ortega from Mexico poses for a portrait as he attends a town hall style meeting about DACA recipients hosted by Congressman Luis Gutierrez (D-IL 4th Dist) speaks about protecting DACA recipients in Chicago, Illinois, U.S. September 14, 2017. Picture taken September 14, 2017. REUTERS/Joshua Lott

Deferred Action for Childhood Arrivals (DACA) recipient Norman Hoerdemann, center, has her portrait taken as two security guards stand in the foreground during a town hall style meeting about DACA recipients hosted by Congressman Luis Gutierrez (D-IL 4th Dist) speaks about protecting DACA recipients in Chicago, Illinois, U.S. September 14, 2017. Picture taken September 14, 2017. REUTERS/Joshua Lott

Deferred Action for Childhood Arrivals (DACA) recipients and members of the public attend a town hall style meeting as Congressman Luis Gutierrez (D-IL 4th Dist) speaks about protecting DACA recipients in Chicago, Illinois, U.S. September 14, 2017. Picture taken September 14, 2017. REUTERS/Joshua Lott

Deferred Action for Childhood Arrivals (DACA) recipient Alejandro Villasenor (L), from Mexico speaks speaks with other DACA recipient s during a town hall style meeting hosted by Congressman Luis Gutierrez (D-IL 4th Dist) speaks about protecting DACA recipients in Chicago, Illinois, U.S. September 14, 2017. Picture taken September 14, 2017. REUTERS/Joshua Lott

Attorney General of California Xavier Becerra meets with his staff at the U.S.-Mexico border prior to announcing a lawsuit against the Trump Administration over its plans to begin construction of border wall in San Diego and Imperial Counties, in San Diego, California, U.S., September 20, 2017. REUTERS/Mike Blake

An ethnic Chinese Christian, who fled Indonesia after wide scale rioting and overstayed her visa in the U.S., holds a handwritten list of appointments with ICE, the last entry reading "...Instructed to report on 10/9/17 at 9:30 with tickets and itinerary to directly depart the U.S. on or before 11/9/17..,." before a scheduled ICE family meeting including her husband and five year-old daughter in Manchester, New Hampshire, U.S., October 13, 2017. REUTERS/Brian Snyder

An ethnic Chinese Christian, who fled Indonesia after wide scale rioting and overstayed her visa in the U.S., holds her daughter's hand and a handwritten list of appointments with ICE, the last entry reading "...Instructed to report on 10/9/17 at 9:30 with tickets and itinerary to directly depart the U.S. on or before 11/9/17..,." before a scheduled ICE family meeting including her husband and five year-old daughter in Manchester, New Hampshire, U.S., October 13, 2017. REUTERS/Brian Snyder

Demonstrators holding an "Interfaith Prayer Vigil for Immigrant Justice" talk to ethnic Chinese Christians who fled Indonesia after wide scale rioting decades ago and overstayed their visas in the U.S., following their family meeting, including their five year-old daughter (R), with ICE, in Manchester, New Hampshire, U.S., October 13, 2017. REUTERS/Brian Snyder

Ethnic Chinese Christians who fled Indonesia after wide scale rioting decades ago and overstayed their visas in the U.S. arrive for a family meeting with ICE in Manchester, New Hampshire, U.S., October 13, 2017. REUTERS/Brian Snyder

Demonstrators holding an "Interfaith Prayer Vigil for Immigrant Justice" talk to ethnic Chinese Christians who fled Indonesia after wide scale rioting decades ago and overstayed their visas in the U.S., following their family meeting, including their five year-old daughter (C), with ICE, in Manchester, New Hampshire, U.S., October 13, 2017. REUTERS/Brian Snyder

Demonstrators holding an "Interfaith Prayer Vigil for Immigrant Justice" talk to ethnic Chinese Christians who fled Indonesia after wide scale rioting decades ago and overstayed their visas in the U.S., following their family meeting, including their five year-old daughter (C), with ICE, in Manchester, New Hampshire, U.S., October 13, 2017. REUTERS/Brian Snyder

U.S. President Donald Trump speaks during a meeting with Republican members of the Senate about immigration at the White House in Washington, U.S., January 4, 2018. REUTERS/Kevin Lamarque

U.S. President Donald Trump speaks during a meeting with Republican members of the Senate about immigration at the White House in Washington, U.S., January 4, 2018. REUTERS/Kevin Lamarque

U.S. President Donald Trump speaks during a meeting with Republican members of the Senate about immigration at the White House in Washington, U.S., January 4, 2018. REUTERS/Kevin Lamarque

Flanked by Senator Chuck Grassley (L) and Homeland Security Secretary Kirstjen Nielsen (R), U.S. President Donald Trump speaks during a meeting with Republican members of the Senate about immigration at the White House in Washington, U.S., January 4, 2018. REUTERS/Kevin Lamarque