What to watch in Tuesday’s primaries as Graham Platner tries to clinch Senate nomination in Maine

WASHINGTON (AP) — Voters across Maine, Nevada, South Carolina and North Dakota head to the polls Tuesday for another day of primary elections in America, but much of the political world will be focused on Maine’s high-stakes U.S. Senate contest.

The results are not in question. Neither Republican incumbent Sen. Susan Collins nor Democratic challenger Graham Platner faces serious opposition for their party’s nomination. And yet Tuesday marks an especially significant moment for Platner, the embattled veteran and oyster farmer, who is fighting to rebuild his credibility in a campaign rocked by controversy.

Elsewhere, President Donald Trump’s clout within his party will be tested anew in states like South Carolina and Nevada, where he’s endorsed his favored candidates. Democrats hope to build momentum in Nevada in their broader push to reclaim key governor’s seats.

Powerful family ties will also be in the spotlight in Maine and South Carolina, where candidates with political pedigrees are running for office.

Here’s what we’re watching Tuesday.

Platner sits at the very center of the Democratic Party’s quest to reclaim the Senate majority this fall. So Democrats need him to take a significant step forward Tuesday, with the eyes of the nation watching, in the urgent task of rebuilding his credibility.

It was barely a week ago when revelations surfaced that Platner had engaged in sexually explicit messages with multiple women while married. Allies wondered if more baggage would emerge, and then The New York Times reported new allegations about his behavior during previous relationships.

There is no doubt that Platner will win his party’s Senate nomination Tuesday. His most serious opponent, Maine Gov. Janet Mills, suspended her campaign in April after it became clear Platner was in a commanding position. That said, Mills is still technically on the ballot and some advocates have suggested voting for her as a way to protest Platner.

More important, perhaps, will be Platner’s public remarks Tuesday night. Friends and foes alike will be paying close attention to how he addresses the evolving questions about his past and whether he can refocus the race on Collins.

It’s not just Platner who will be tested Tuesday — the Democratic Party itself will face new scrutiny about its standards in the Trump era.

So far, Platner’s biggest national supporters have remained firmly behind him. Sen. Bernie Sanders, one of his earliest backers, reiterated his support for the Maine Democrat on Saturday, a day after Rep. Ro Khanna appeared alongside Platner at a campaign event.

The public show of support reflects how much Democratic politics have changed over the last decade.

At the height of the #MeToo movement, Democrats argued they held their candidates to a higher standard than Republicans, particularly as Trump faced a series of sexual misconduct allegations. Back in 2017, Democratic leaders pressured Sen. Al Franken to resign in the wake of allegations of inappropriate touching and kissing.

The reaction to Platner has been markedly different. Even after allegations surfaced that he locked a woman in a room, among other accusations of inappropriate behavior, most Democrats have declined to abandon him.

“I think President Trump set a new standard,” Sen. Mark Warner, D-Va., told ABC’s “This Week” on Sunday.

Expect Democratic leaders to face a new round of difficult questions about their own standards after Tuesday’s primary.

Just a week ago, Trump’s pick for Iowa governor was defeated in a rare rebuke from his own party. Trump hopes to move past the political embarrassment during a fresh test of his political clout in South Carolina and Nevada.

The biggest may come in South Carolina, where Trump has endorsed Lt. Gov. Pamela Evette in a five-person Republican gubernatorial primary. There are a number of other high-profile candidates in the race, including Reps. Nancy Mace and Ralph Norman, who may prove formidable. State Attorney General Alan Wilson and millionaire Rom Reddy are also running.

Trump will also keep a close eye on whether one of his closest allies in Congress, Sen. Lindsey Graham, is forced into a runoff for the first time ever. Graham faces appliance business owner Mark Lynch, who Trump has said “would be a DISASTER for the Republican Party” if elected.

Candidates must earn a majority of the vote to avoid a June 23 runoff.

Meanwhile, in Nevada’s 2nd congressional district, Trump-backed candidate retired Lt. Col. David Flippo is facing former state Sen. James Settelmeyer. Republican Rep. Mark Amodei, who announced his retirement from the seat, has endorsed Settelmeyer, as has the state’s governor, Republican Gov. Joe Lombardo.

Democrats will select a nominee for Nevada’s governor race, where they have a real opportunity to flip control of the swing state this fall. Republican incumbent Gov. Joe Lombardo is considered one of the most vulnerable governors in the country.

The race is a window into the broader political landscape this fall as Democrats go on the offensive in several states Trump won in 2024.

The Democrats vying to challenge Lombardo include state Attorney General Aaron Ford, who has the backing of the Democratic congressional delegation and former Vice President Kamala Harris. He would be the first Black man elected governor of Nevada. He’s facing Democrat Alexis Hill, a county commissioner in northern Nevada who campaigned as a candidate willing to shake things up.

Democrats are also fighting to win Republican-held governors’ seats in states like Georgia, Ohio and Iowa.

Republicans, of course, have several pickup opportunities of their own, despite the challenging political environment for their party. They include Arizona, Michigan, Minnesota and Wisconsin.

The power of political family ties will be tested in at least two states where candidates with last names you’ll likely recognize are on the ballot.

In Maine, Democrats Angus King III and Hannah Pingree are competing for their party’s nomination for governor. King is the businessman son of U.S. Sen. Angus King. Pingree, a former speaker of the state House, is the daughter of U.S. Rep. Chellie Pingree, who has represented the state’s 1st congressional district since 2009.

There’s a member of an even bigger political dynasty on Maine’s ballot, too. Republican candidate for governor Jonathan Bush, a 57-year-old businessman, is the nephew of former President George H.W. Bush — and yes, that also makes him the cousin of former President George W. Bush. Despite the family ties, Jonathan Bush is casting himself as the outsider in the race and focusing heavily on his local business experience.

And don’t forget about South Carolina, where Republican Attorney General Alan Wilson is running for governor. While he has established his own resume as the state’s top law enforcement official, Wilson also happens to be the son of U.S. Rep. Joe Wilson, who has served South Carolina in the House of Representatives for a quarter century.

Just weeks ago, longtime Rep. James Clyburn, the dean of South Carolina Democrats, appeared to be facing the greatest threat to his political future.

Republican lawmakers, backed by Trump, considered a congressional map that would have significantly altered Clyburn’s majority-Black district and made it harder for him to hold onto the seat for an 18th term. But the Republican-led state Senate rejected the effort, leaving his district largely intact.

Clyburn is heavily favored in Tuesday’s Democratic primary against a little-known challenger. As South Carolina’s lone Democratic House member, he’s one of the party’s most influential figures, with many Democrats expecting him to play a significant role in the lead-up to the 2028 presidential race.

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Peoples reported from New York.