Voters in four states cast ballots Tuesday in primary elections that will shape key general-election contests for U.S. Senate, governor, and House seats, with control of the Senate at stake in November.

In Maine, Democrats are deciding their Senate nominee in a race between Graham Platner and state Senate President Troy Jackson. Platner, 38, has drawn support from national progressive groups and independent activists but also faced scrutiny over past text messages and an abuse accusation from an ex-girlfriend, which he has denied. Jackson, 58, a labor union leader, has argued he is the more electable candidate against Collins, who is seeking a sixth term. Collins has represented Maine since 1997 and recently disclosed that she has a tremor but intends to seek reelection. The primary has divided the state Democratic establishment, with some party leaders backing Platner despite the controversy, as reported by MSI.

In Nevada, Democrats are selecting a challenger for Republican Gov. Joe Lombardo. State Treasurer Zach Conine is the leading candidate, though several others are on the ballot. Lombardo, first elected in 2022, is seeking a second term. The primary will test whether Democrats can consolidate behind a single challenger in a state that has shifted toward Republicans in recent cycles.

South Carolina’s Republican gubernatorial primary features a crowded field of six candidates. Lt. Gov. Pamela Evette, who has Trump’s endorsement, is competing against state Attorney General Alan Wilson, state Rep. Bobby Charles, and others. The primary is seen as a test of Trump’s influence in the state. The winner will likely face Democratic state Sen. Jermaine Johnson.

In North Dakota, a special primary is underway to fill the at-large U.S. House seat vacated by Rep. Kelly Armstrong after his resignation. Multiple candidates from both parties are vying for their party’s nomination.

Polls closed at 7 p.m. local time in Maine and Nevada, with results expected later Tuesday evening. South Carolina polls close at 7 p.m. EDT. North Dakota polls close at 8 p.m. EDT.