South Carolina, Maine, Nevada and North Dakota primary results

Key Points:

• Sen. Susan Collins described allegations against Democratic Senate candidate Graham Platner as "extremely troubling and serious," urging him to provide detailed answers as Maine voters head to the polls for the primary election.
• Rep. Nancy Mace accused a member of rival gubernatorial candidate Pamela Evette's campaign of assaulting one of her supporters in South Carolina; the accused, a campaign volunteer, was arrested and has since resigned.
• Graham Platner faces multiple controversies including offensive social media posts, a Nazi-linked tattoo, and allegations of inappropriate behavior, with a former campaign director publicly condemning his character just before the Maine primary.
• South Carolina Lt. Gov. Pamela Evette, endorsed by former President Trump, is competing in a crowded GOP gubernatorial primary where Trump's influence is being tested following recent mixed results in other state primaries.
• Maine Republican lawmakers warn voters to focus on Platner's progressive policies, such as support for the Green New Deal, which they argue could have detrimental economic impacts, despite the candidate's personal scandals dominating headlines.