Primary voters in Maine, Nevada, South Carolina and North Dakota headed to the polls Tuesday to decide competitive races for the U.S. Senate, House, governor and more. The contests carry high stakes heading into November, particularly in Maine where Democrats view flipping Republican Sen. Susan Collins' seat as essential to their path toward controlling the Senate.
Collins, a five-term incumbent who has held her seat for 30 years, faces Democratic political newcomer Graham Plater in what both parties acknowledge is one of the most consequential Senate races of the cycle. The outcome could determine majority control of the chamber come January.
What the Left Is Saying
Progressive Democrats argue that Collins represents an entrenched political establishment that has failed to deliver for working-class Americans. They point to her seniority and ability to secure federal funding as insufficient justification for keeping the seat Republican.
Plater has run a campaign centered on his argument that the political system is rigged against ordinary citizens. His candidacy already forced Democratic Gov. Janet Mills out of the Senate race, consolidating progressive support behind his bid.
Recent controversies have complicated Plater's path. The New York Times published accusations that he was physically threatening in a past relationship, along with previous revelations about inappropriate text messages early in his marriage. In an interview with Maine Public, Plater denied the accusations and maintained his campaign is focused on kitchen-table issues facing Mainers.
Senate Majority Leader Chuck Schumer said in a statement that Democrats remain committed to competing for every seat, noting that Senate races are decided by local factors. The Democratic Senatorial Campaign Committee has not commented on whether it will air ads in Maine.
What the Right Is Saying
Republicans argue that Collins' three decades of experience and proven track record of bringing federal resources to Maine make her invaluable to the state. They characterize Plater as an unvetted outsider whose controversies disqualify him from representing Maine in the Senate.
National Republican Senatorial Committee spokesperson Sarah Andrews said Collins has consistently delivered for Maine families, pointing to her work on appropriations committees and constituent services casework.
Trump-endorsed candidates across the states have sought to contrast themselves with career politicians. In South Carolina, Lt. Gov. Pamela Evette, who received Trump's endorsement in the gubernatorial race, called herself a proven conservative who would continue the president's agenda from the statehouse.
Collins has not directly responded to Plater's controversies but her campaign released a statement emphasizing her commitment to Maine and her record of bipartisan work.
What the Numbers Show
Senate math makes the Maine race pivotal. Democrats currently hold 47 seats with two independents who caucus with them, while Republicans have 51. To win majority control without winning the presidency in a tie-breaking scenario, Democrats need to flip at least four Republican seats while losing no more than two of their own.
Cook Political Report rates the Maine Senate race as Lean Republican but notes that competitive primaries can shift dynamics heading into November. Recent internal polling has not been publicly released by either campaign.
In Nevada, Cook rates the governor's race as a toss-up with incumbent Republican Joe Lombardo facing an uncertain path to reelection. Tourism-dependent Nevada has seen declining domestic and international visitors under Trump's economic policies, according to state tourism data.
Maine gubernatorial polls show former Maine CDC Director Dr. Nirav Shah leading the Democratic primary field, though former Maine Senate President Troy Jackson appears to be surging ahead of Tuesday's ranked-choice election. Cook Political Report analysis indicates the seat is likely to remain in Democratic hands regardless of which party wins the nomination.
The Bottom Line
Tuesday's primaries will set the stage for a high-spending fall campaign in Maine, where control of the Senate may ultimately hinge on Collins' political durability at 30 years in office. National parties from both sides are expected to pour resources into the state.
Voters in Nevada and South Carolina will send signals about Trump's endorsement power after his candidate lost an Iowa primary last week. Political watchers will closely monitor whether Evette can avoid a runoff in South Carolina or if her challengers can mount serious competition despite the presidential backing.
The ranked-choice voting system in Maine adds unpredictability to both the Senate and gubernatorial races, as final outcomes may not be determined until secondary choice tabulations are complete. Full results from all four states are expected by late Tuesday evening.