Five states are holding primaries today. A couple of the key races are highlighted below. Click or tap a state name for results from The New York Times. All times are Eastern.
Virginia: Polls close at 7:00 PM. There's a three-way battle for the Republican Senate nomination. Regardless of who wins, incumbent Tim Kaine is likely to be reelected in November. In the House, six Democrats are vying to take on GOP Rep. Barbara Comstock in a swing district near Washington, D.C.
South Carolina: Polls also close at 7:00 PM. Incumbent Gov. Henry McMaster, who took over when Nikki Haley became U.N. Ambassador, faces four opponents as he seeks the nomination for his first full term. McMaster has been ahead in recent polling, but seems likely to fall short of the 50% required to avoid a runoff. Whomever ultimately wins the nomination will be favored in the fall. The 1st congressional district may also prove interesting. President Trump has endorsed state Rep. Katie Arrington over incumbent Mark Sanford, who he said would be "better off in Argentina" in a Tuesday afternoon tweet.
Maine: Polls close at 8:00 PM. As an independent, Sen. Angus King will not be on the ballot today. Both the Republican and Democratic primaries are single-candidate contests. King is expected to win a 2nd term in November. Gov. Paul LePage is termed out. There are competitive primaries in both parties; the results may not be known tonight due to Maine's use of ranked choice voting.
North Dakota: Poll hours are set locally, but virtually all will be closed by 9:00 PM. A very competitive Senate race is shaping up for the fall. Incumbent Democrat Heidi Heitkamp has no primary opponent, while U.S. Rep. Kevin Cramer is expected to win the Republican nomination fairly easily. Cramer
Nevada: Polls close at 10:00 PM. Several interesting elections today. There's both a Senate and gubernatorial race this year, both are expected to be highly competitive in November. In the Senate, Democratic Rep. Jacky Rosen is expected to face incumbent Republican Dean Heller in November. A competitive primary in the Democratic gubernatorial race is expected between two Clark County Commissioners. On the Republican side, Attorney General Adam Laxalt is expected to emerge as nominee. He also received an endorsement from Trump on Tuesday
Turning to the House, there are competitive primaries in both the 3rd and 4th districts. Both districts are being vacated by Democratic incumbents. The 4th district was created after the 2010 Census. There have been three one-term Representatives here: Democrat Steven Horsford, Republican Cresent Hardy, and current incumbent Ruben Kihuen. As it turns out, the first two are running to reclaim the seat, and are likely to meet in the fall. In the 3rd district, the competitiveness of the fall race will come more into focus once the GOP chooses its nominee. There are 10 candidates on the Republican side, including controversial businessman Danny Tarkanian.