Incumbent Sen. Lindsey Graham is dominating early returns with 65.4% of the vote, well ahead of challenger Mark Lynch at 22.8%.

Voters across Maine, Nevada, South Carolina and North Dakota head to the polls for another day of primary elections in America.

South Carolina voters are narrowing down candidates in key races for governor and U.S. Senate. Republicans in both contests have played up their ties to Donald Trump, who remains…

Four states vote Tuesday, with Maine’s key Senate race capturing the most national attention and Donald Trump picking sides in South Carolina’s race for governor.

Voters are heading to the polls on June 9, 2026.

Since taking office in 2002, Graham has never been in a runoff in the Republican primary, but undecided voters could break his streak.

Five-Term Republican Sen. Susan Collins will learn who she will face in November as voters head to the polls in Maine's primary election on Tuesday.

Polls open in Maine, North Dakota, Nevada, and South Carolina; voters appear to stand by Democratic challenger Graham Platner despite string of controversies

See live results from primary races in Maine, Nevada and South Carolina.

Incumbent Sen. Lindsey Graham is dominating early returns with 65.4% of the vote, well ahead of challenger Mark Lynch at 22.8%.

Graham spent millions to defeat a primary opponent, NBC News projects, after receiving President Donald Trump’s endorsement last year.

Sen. Lindsey Graham has held the seat since 2003, and Democrats have an uphill battle in any attempt to unseat him.

He spent more than $27 million to fend off five primary challengers in South Carolina.

Sen. Lindey Graham was targeted by former allies of Trump's MAGA movement for his hawkish foreign policy and championing of the Iran war.

Graham Platner won Maine's Democratic primary for US Senate, setting up a high-stakes race against Susan Collins.

The Maine Democrat's personal life drew headlines in a critical Senate contest as voters across four states voted in primaries for the 2026 midterms

Maine Democrat Graham Platner secured his party's nomination to challenge Sen. Susan Collins in November in one of Tuesday's key midterm primaries.