2016 United States presidential election

HOLD FOR STORY- In this May 7, 2019, photo, Dan Bishop answers a question during a debate among Republican candidates for the 9th Congressional District, in Monroe, N.C. Republicans are deciding Tuesday, May 14 who should carry their party’s banner in a high-profile special election for a congressional seat vacant since last year’s election was deemed tainted by fraud. Bishop, who in 2016 sponsored the so-called “bathroom bill,” raised the most in campaign contributions, seeded with $250,000 from the Charlotte attorney’s own bank account. (AP Photo/Chuck Burton)

Former vice president and Democratic presidential candidate Joe Biden speaks during a campaign stop at the Community Oven restaurant in Hampton, N.H., Monday, May 13, 2019. (AP Photo/Michael Dwyer)

FILE - In this Oct. 26, 2018, file photo Ali AlAhmed poses for a photograph in his office in Washington. Citizen Lab says a fake Twitter account unmasked by The Associated Press was but one piece of a vast years-old and multi-lingual campaign aimed at seeding anti-Saudi, anti-Israel and anti-American stories across the internet. The Associated Press was on the verge of publishing a story about how AlAhmed, who is based in the Washington area, had been targeted by hackers posing as a female journalist. (AP Photo/Alex Brandon, File)

FILE - In this Jan. 15, 2019, file photo, New Jersey Senate Minority Leader Tom Kean Jr. , R-Westfield, addresses reporters in Trenton, N.J. Top Republicans are hunting district-by-district for just the right candidates to help them recapture the House, six months after a tidal wave swept 62 Democratic freshmen into office and handed that party control of the chamber. (AP Photo/Julio Cortez, File)

FILE - In this April 27, 2019, file photo, President Donald Trump, right, accompanied by Sen. Ron Johnson, R-Wis., left, arrives at Green Bay Austin Straubel International Airport in Green Bay, Wis. Republicans determined to deliver Wisconsin for Trump next year will emphasize at their state convention that starts Friday that they must do a better job engaging with grassroots voters if they hope to rebound from a devastating 2018. (AP Photo/Andrew Harnik, File)

IN this May 9, 2019, photo, Speaker of the House Nancy Pelosi, D-Calif., speaks on Capitol Hill in Washington. Pelosi introduced a new concept to the debate over President Donald Trump’s behavior: “Self-impeachable.” As Trump appears to be all but goading Democrats into impeachment proceedings, viewing the standoff as potentially politically valuable for his re-election campaign, Democrats are trying to impose restraint, preferring a more methodical approach and letting, as Pelosi says, Trump make the case himself by his stonewalling of Congress. (AP Photo/J. Scott Applewhite)

President Donald Trump speaks during a event on medical billing, in the Roosevelt Room of the White House, Thursday, May 9, 2019, in Washington. (AP Photo/Evan Vucci)

Former Vice President and Democratic presidential candidate Joe Biden speaks at a rally with members of a painters and construction union, Tuesday, May 7, 2019, in Henderson, Nev. (AP Photo/John Locher)

Democratic presidential candidate Sen. Kirsten Gillibrand, left, speaks with Alexa Arredondo, 9, while meeting with community activists on immigration issues at a restaurant, Monday, May 6, 2019, in Las Vegas. (AP Photo/John Locher)

Democratic presidential contender Pete Buttigieg holds a town hall in North Charleston, South Carolina, on Sunday, May 5, 2019. Buttigieg says he's focusing on outreach to minorities, who make up most of the Democratic primary electorate in this early-voting state. (AP Photo/Meg Kinnard)