U.S. President Donald Trump smiles as he prepares to autograph a plaque commemorating the construction of the 200th mile of border wall while visiting the wall on the U.S.-Mexico border in San Luis, Arizona, U.S., June 23, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump is applauded by Arizona Governor Doug Ducey, U.S. Senator Martha McSally (R-AZ), U.S. Rep. Debbie Lesko (R-AZ), U.S. Border Patrol Chief Rodney Scott and others after autographing a plaque on the U.S.-Mexico border wall in San Luis, Arizona, U.S., June 23, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump prepares to autograph a plaque commemorating the construction of the 200th mile of border wall while visiting the wall on the U.S.-Mexico border in San Luis, Arizona, U.S., June 23, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump reads a plaque commemorating the construction of the 200th mile of border wall that he had just autographed while visiting the wall on the U.S.-Mexico border in San Luis, Arizona, U.S., June 23, 2020. REUTERS/Carlos Barria

Oklahoma Governor Kevin Stitt is seen after he received an autograph from U.S. President Donald Trump during a roundtable discussion on the reopening of small businesses in the State Dining Room at the White House in Washington, U.S., June 18, 2020. REUTERS/Leah Millis

U.S. President Donald Trump signs an autograph for Oklahoma Governor Kevin Stitt during a roundtable discussion on the reopening of small businesses in the State Dining Room at the White House in Washington, U.S., June 18, 2020. REUTERS/Leah Millis

A woman wearing a face mask signs her autograph on the legendary graffiti-covered John Lennon Wall as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, April 6, 2020. REUTERS/David W Cerny TPX IMAGES OF THE DAY

Badminton - All England Open Badminton Championships - Arena Birmingham, Birmingham, Britain - March 15, 2020 Japan's Hiroyuki Endo signs autographs for fans after winning his men's doubles final match with Yuta Watanabe against Indonesia’s Marcus Fernaldi Gideon and Kevin Sanjaya Sukamuljo Action Images via Reuters/Andrew Boyers

Badminton - All England Open Badminton Championships - Arena Birmingham, Birmingham, Britain - March 15, 2020 Japan's Hiroyuki Endo signs autographs for fans after winning his men's doubles final match with Yuta Watanabe against Indonesia’s Marcus Fernaldi Gideon and Kevin Sanjaya Sukamuljo Action Images via Reuters/Andrew Boyers

Badminton - All England Open Badminton Championships - Arena Birmingham, Birmingham, Britain - March 15, 2020 Japan's Yuta Watanabe signs autographs for fans after winning his men's doubles final match with Hiroyuki Endo against Indonesia’s Marcus Fernaldi Gideon and Kevin Sanjaya Sukamuljo Action Images via Reuters/Andrew Boyers

Four-time champion Martin Buser gives an autograph to a race fan at the start of the 2020 Iditarod Trail Sled Dog Race in Anchorage, Alaska, U.S. March 7, 2020. REUTERS/Yereth Rosen

Soccer Football - FA Cup Fifth Round - Sheffield Wednesday v Manchester City - Hillsborough, Sheffield, Britain - March 4, 2020 Manchester City manager Pep Guardiola signs autographs for fans before the match Action Images via Reuters/Lee Smith

Tennis - ATP 500 - Dubai Tennis Championships - Dubai Duty Free Tennis Stadium, Dubai, United Arab Emirates - February 29, 2020 Serbia's Novak Djokovic signs autographs for fans after winning the Final against Greece's Stefanos Tsitsipas REUTERS/Ahmed Jadallah

Tennis - ATP 500 - Dubai Tennis Championships - Dubai Duty Free Tennis Stadium, Dubai, United Arab Emirates - February 29, 2020 Serbia's Novak Djokovic signs autographs for fans after winning the Final against Greece's Stefanos Tsitsipas REUTERS/Ahmed Jadallah

Tennis - ATP 500 - Dubai Tennis Championships - Dubai Duty Free Tennis Stadium, Dubai, United Arab Emirates - February 29, 2020 Serbia's Novak Djokovic signs autographs for fans after winning the Final against Greece's Stefanos Tsitsipas REUTERS/Ahmed Jadallah

Tennis - ATP 500 - Dubai Tennis Championships - Dubai Duty Free Tennis Stadium, Dubai, United Arab Emirates - February 29, 2020 Serbia's Novak Djokovic signs autographs for fans after winning the Final against Greece's Stefanos Tsitsipas REUTERS/Ahmed Jadallah

Soccer Football - Premier League - AFC Bournemouth v Chelsea - Vitality Stadium, Bournemouth, Britain - February 29, 2020 Chelsea manager Frank Lampard signs autographs for fans as he arrives at the ground before the match Action Images via Reuters/Matthew Childs EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

Tennis - ATP 500 - Dubai Tennis Championships - Dubai Duty Free Tennis Stadium, Dubai, United Arab Emirates - February 28, 2020 Serbia's Novak Djokovic signs his autograph for fans after winning his Semi Final match against France's Gael Monfils REUTERS/Thaier Al-Sudani

Info Wars host Alex Jones signs an autograph at the Conservative Political Action Conference (CPAC) annual meeting at National Harbor in Oxon Hill, Maryland, U.S., February 27, 2020. REUTERS/Joshua Roberts

Actor Helen Mirren signs autographs as she arrives to attend a photo call during the 70th Berlinale International Film Festival in Berlin, Germany, February 27, 2020. REUTERS/Michele Tantussi

Actor Helen Mirren signs autographs as she arrives to attend a photo call during the 70th Berlinale International Film Festival in Berlin, Germany, February 27, 2020. REUTERS/Michele Tantussi

Actor Cate Blanchett signs autographs as she arrives for the screening of the series "Stateless" during the 70th Berlinale International Film Festival in Berlin, Germany February 26, 2020. REUTERS/Michele Tantussi

Actor Cate Blanchett signs autographs as she arrives for the screening of the series "Stateless" during the 70th Berlinale International Film Festival in Berlin, Germany February 26, 2020. REUTERS/Michele Tantussi

Actor Cate Blanchett signs autographs as she arrives for the screening of the series "Stateless" during the 70th Berlinale International Film Festival in Berlin, Germany February 26, 2020. REUTERS/Michele Tantussi

Actor Cate Blanchett signs autographs as she arrives for the screening of the series "Stateless" during the 70th Berlinale International Film Festival in Berlin, Germany February 26, 2020. REUTERS/Michele Tantussi

Tennis - ATP 500 - Dubai Tennis Championships - Dubai Duty Free Tennis Stadium, Dubai, United Arab Emirates - February 26, 2020 Serbia's Novak Djokovic signs autographs for fans as he celebrates after winning his second round match against Germany's Philipp Kohlschreiber REUTERS/Thaier Al-Sudani

Tennis - ATP 500 - Dubai Tennis Championships - Dubai Duty Free Tennis Stadium, Dubai, United Arab Emirates - February 26, 2020 Serbia's Novak Djokovic signs autographs for fans as he celebrates after winning his second round match against Germany's Philipp Kohlschreiber REUTERS/Thaier Al-Sudani

Tennis - ATP 500 - Dubai Tennis Championships - Dubai Duty Free Tennis Stadium, Dubai, United Arab Emirates - February 26, 2020 Greece's Stefanos Tsitsipas signs autographs for fans after winning his second round match against Kazakhstan's Alexander Bublik REUTERS/Thaier Al-Sudani

Rugby Union - Six Nations Championship - England v Ireland - Twickenham Stadium, London, Britain - February 23, 2020 England's Owen Farrell signs his autograph for fans after the match REUTERS/Hannah Mckay

Soccer Football - Premier League - Wolverhampton Wanderers v Norwich City - Molineux Stadium, Wolverhampton, Britain - February 23, 2020 Norwich City's Teemu Pukki signs his autograph for a fan inside the stadium before the match Action Images via Reuters/Craig Brough EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

U.S. Democratic presidential candidate Senator Elizabeth Warren autographs a campaign sign for a boy after a town hall event at the Clark County Government Center Amphitheater in Las Vegas, Nevada, U.S. February 21, 2020. REUTERS/David Ryder

Democratic U.S. presidential candidate Senator Bernie Sanders signs autographs to supporters during a Get Out the Early Vote campaign rally in Santa Ana, California, U.S., February 21, 2020. REUTERS/Mike Blake

Actor Hiroyuki Sanada sings autographs as he arrives for the screening of the movie "Minamata" during the 70th Berlinale International Film Festival in Berlin, Germany, February 21, 2020. REUTERS/Michele Tantussi

Actor Bill Nighy signs autographs before attending a photo call and news conference to promote the movie "Minamata" during the 70th Berlinale International Film Festival in Berlin, Germany, February 21, 2020. REUTERS/Michele Tantussi

Actor Katherine Jenkins signs autographs before attending a photo call and news conference to promote the movie "Minamata" during the 70th Berlinale International Film Festival in Berlin, Germany, February 21, 2020. REUTERS/Michele Tantussi

U.S. Democratic presidential candidate Senator Elizabeth Warren autographs a sign for a supporter as she holds a "Canvass Kickoff" event at her campaign field office in North Las Vegas, Nevada, U.S. February 20, 2020. REUTERS/David Ryder

An autographed figurine of U.S. Democratic presidential candidate Senator Elizabeth Warren lies on a table as Warren holds a "Canvass Kickoff" event at her campaign field office in North Las Vegas, Nevada, U.S. February 20, 2020. REUTERS/David Ryder

Jeremy Irons signs autographs on the red carpet as he arrives for the screening of the movie "My Salinger Year" at the 70th Berlinale International Film Festival in Berlin, Germany, February 20, 2020. REUTERS/Michele Tantussi

Berenice Bejo signs autographs on the red carpet as she arrives for the screening of the movie "My Salinger Year" at the 70th Berlinale International Film Festival in Berlin, Germany, February 20, 2020. REUTERS/Fabrizio Bensch

Sigourney Weaver signs autographs on the red carpet as she arrives for the screening of the movie "My Salinger Year" at the 70th Berlinale International Film Festival in Berlin, Germany, February 20, 2020. REUTERS/Fabrizio Bensch

Sigourney Weaver signs autographs on the red carpet as she arrives for the screening of the movie "My Salinger Year" at the 70th Berlinale International Film Festival in Berlin, Germany, February 20, 2020. REUTERS/Fabrizio Bensch

Jeremy Irons signs autographs on the red carpet as he arrives for the screening of the movie "My Salinger Year" at the 70th Berlinale International Film Festival in Berlin, Germany, February 20, 2020. REUTERS/Fabrizio Bensch

Jeremy Irons signs autographs on the red carpet as he arrives for the screening of the movie "My Salinger Year" at the 70th Berlinale International Film Festival in Berlin, Germany, February 20, 2020. REUTERS/Fabrizio Bensch

Actor Sigourney Weaver signs autographs as she attends a news conference to promote the movie "My Salinger Year" during the 70th Berlinale International Film Festival in Berlin, Germany, February 20, 2020. REUTERS/Michele Tantussi

Actor Sigourney Weaver signs autographs as she attends a news conference to promote the movie "My Salinger Year" during the 70th Berlinale International Film Festival in Berlin, Germany, February 20, 2020. REUTERS/Michele Tantussi

Rod Blagojevich, the ex-Illinois governor convicted of trying to peddle Barack Obama's vacated U.S. Senate seat, autographs a cardboard photo of himself outside his home after U.S. President Donald Trump commuted his prison sentence, in Chicago, Illinois, U.S. February 19, 2020. REUTERS/Joshua Lott REFILE - CLARIFYING LOCATION

Rod Blagojevich, the ex-Illinois governor convicted of trying to peddle Barack Obama's vacated U.S. Senate seat, autographs a cardboard photo of himself outside his home after U.S. President Donald Trump commuted his prison sentence, in Chicago, Illinois, U.S. February 19, 2020. REUTERS/Joshua Lott REFILE - CLARIFYING LOCATION

Cast member Chris Pratt signs autographs at the premiere for the film "Onward" in Los Angeles, California, U.S. February 18, 2020. REUTERS/Mario Anzuoni

Cast member Chris Pratt signs autographs at the premiere for the film "Onward" in Los Angeles, California, U.S. February 18, 2020. REUTERS/Mario Anzuoni

Cast member Jim Carrey signs autographs at the premiere of "Sonic the Hedgehog" in Los Angeles, California, U.S., February 12, 2020. REUTERS/Mario Anzuoni

Democratic 2020 U.S. presidential candidate and U.S. Senator Elizabeth Warren (D-MA) autographs a book for a girl at a campaign town hall meeting in Portsmouth, New Hampshire, U.S. February 10, 2020. REUTERS/Brian Snyder

Brad Pitt gives his autograph to Sandy Powell during the Oscars show at the 92nd Academy Awards in Hollywood, Los Angeles, California, U.S., February 9, 2020. REUTERS/Mario Anzuoni

Brad Pitt gives his autograph to Sandy Powell during the Oscars show at the 92nd Academy Awards in Hollywood, Los Angeles, California, U.S., February 9, 2020. REUTERS/Mario Anzuoni TPX IMAGES OF THE DAY

Soccer Football - Bundesliga - Bayern Munich v RB Leipzig - Allianz Arena, Munich, Germany - February 9, 2020 Bayern Munich interim coach Hansi Flick signs autographs before the match REUTERS/Andreas Gebert DFL regulations prohibit any use of photographs as image sequences and/or quasi-video

Soccer Football - Championship - Huddersfield Town v Queens Park Rangers - John Smith's Stadium, Huddersfield, Britain - February 8, 2020 Huddersfield Town manager Danny Cowley sings autographs before the match Action Images/John Clifton EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

Roger Federer signs autographs for fans during a photo session ahead of his "Match in Africa" exhibition tennis match against Rafael Nadal in Cape Town, South Africa, February 7, 2020. REUTERS/Mike Hutchings

Rafael Nadal signs autographs for fans during a photo session ahead of his "Match in Africa" exhibition tennis match against Roger Federer in Cape Town, South Africa, February 7, 2020. REUTERS/Mike Hutchings

Tennis - Australian Open - Men's Singles Final - Melbourne Park, Melbourne, Australia - February 2, 2020 Serbia's Novak Djokovic signs autographs for fans after winning his match against Austria's Dominic Thiem REUTERS/Issei Kato

Tennis - Australian Open - Men's Singles Final - Melbourne Park, Melbourne, Australia - February 2, 2020 Serbia's Novak Djokovic signs autographs for fans after winning his match against Austria's Dominic Thiem REUTERS/Issei Kato

Tennis - Australian Open - Men's Singles Final - Melbourne Park, Melbourne, Australia - February 3, 2020. Serbia's Novak Djokovic signs autographs after winning his match against Austria's Dominic Thiem. REUTERS/Issei Kato