Midterm elections

Michael Bernstein is shown while shopping in Troy, Mich., Wednesday, Dec. 19, 2018. Bernstein voted for Donald Trump in 2016 and likely would do so again in 2020 if he sought a second term in the White House. Bernstein, 52, points to Trump's success in getting justices approved to the U.S. Supreme Court and the positive economy as evidence he chose the right candidate, but the freelance auto writer from suburban Detroit could do without some of what Trump brings. A small, but significant slice of the American electorate may hold the key to President Donald Trump’s political future. (AP Photo/Paul Sancya)

FILE - In this Dec. 5, 2018, file photo, Leslie McCrae Dowless Jr., poses for a portrait outside his home in Bladenboro, N.C. State investigators have described Dowless as a “person of interest” in their probe into 2018 voting irregularities involving absentee ballots. (Travis Long/The News & Observer via AP, File)

FILE - In this Dec. 5, 2018 photo, Leslie McCrae Dowless poses for a portrait outside of his home in Bladenboro, N. C. N.C. Board of Elections Executive Director Kim Strach warned in a January 2017 letter obtained by The Associated Press that those involved in illegally harvesting absentee ballots in rural Bladen County would likely do it again if they weren’t prosecuted. (Travis Long/The News & Observer via AP)

In this Dec. 18, 2018, photo, President Donald Trump speaks during a roundtable discussion on the Federal Commission on School Safety report, in the Roosevelt Room of the White House in Washington. Republicans in early-voting states are grappling with how _ and whether _ to protect Trump from a potential primary challenger in 2020. South Carolina GOP leaders said Wednesday they were considering cancelling their presidential primary. (AP Photo/Evan Vucci)

FILE - In this Nov. 6, 2018, file photo, U.S. Rep. Beto O'Rourke, the 2018 Democratic Candidate for U.S. Senate in Texas, makes his concession speech at his election night party in El Paso, Texas. During the Texas Senate race, some Democrats grumbled that O'Rourke wasn't softening his liberal positions enough to finish a near-upset of Ted Cruz. Now, as the one-time punk rocker mulls a 2020 White House run, some activists are suggesting he's not liberal enough. O’Rourke says he rejects party labels, but he may not be able to avoid being confined to an ideological lane forever. (AP Photo/Eric Gay, File)

FILE - In this Nov. 13, 2018, file photo, U.S. Rep. Bruce Poliquin, R-Maine, speaks at a news conference in Augusta, Maine. Poliquin, who has disputed his loss in the first ranked-choice congressional race in U.S. history is dropping his request for a recount. Poliquin challenged the system in federal court, and a judge ruled against him on Thursday, Dec. 13, 2018. He also requested the recount, which has been taking place in Augusta. (AP Photo/Robert F. Bukaty, files)

FILE - In this Nov. 7, 2018, file photo, Mark Harris speaks to the media during a news conference in Matthews, N.C. Legislation quickly passed by North Carolina’s lawmakers would require new primaries in a still-undecided U.S. House race marred with ballot fraud allegations, potentially replacing the Republican nominee at the center of the disputed race. If the state elections board decides ballot irregularities or other problems cast the true outcome into doubt and force a redo, the legislation would require new primary elections in the 9th Congressional District race. (AP Photo/Chuck Burton, File)

FILE - In this Nov. 7, 2018, file photo, Mark Harris speaks to the media during a news conference in Matthews, N.C. The nation's last unresolved fall congressional race with Harris against Democrat Dan McCready is awash in doubt as North Carolina election investigators concentrate on a rural county where absentee-ballot fraud allegations are so flagrant they've put the Election Day result into question. (AP Photo/Chuck Burton, File)

In this Dec. 13, 2018, photo, former Vice President Joe Biden speaks at the University of Utah in Salt Lake City. As he considers running for president, Biden is talking with friends and longtime supporters about whether, at 76, he’s too old to seek the White House, according to several sources who have spoken with the former Democratic vice president. (AP Photo/Rick Bowmer)