Tuesday's takeaways: Platner's big night, Clyburn carries on and Trump's support gets mixed results

Attendees celebrate as Democratic U.S. Senate candidate Graham Platner speaks during a primary election night watch party after winning the Democratic nomination Tuesday, June 9, 2026, in Blue Hill, Maine. (AP Photo/Robert F. Bukaty)

WASHINGTON (AP) — Nevada, South Carolina and North Dakota hosted primary elections Tuesday, but much of the political world was focused on Maine’s high-stakes U.S. Senate contest.

The results were never in question. Neither Republican incumbent Sen. Susan Collins nor Democratic challenger Graham Platner faced serious opposition for their party’s nomination. And yet Tuesday marked 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 was tested anew in states like South Carolina and Nevada, where he endorsed his favored candidates. Democrats hoped to build momentum in Nevada as part of a broader push to reclaim key governor’s seats.