Maine’s Platner faces test as four US states hold midterm primary votes

Published 8 June 2026 · politics

Four states – Maine, Nevada, South Carolina and North Dakota – are holding party primaries ahead of November’s midterm elections. Four states are set to

Four states – Maine, Nevada, South Carolina and North Dakota – are holding party primaries ahead of November’s midterm elections. Four states are set to hold their primary votes, further solidifying the battle lines for the United States midterm elections in November. On Tuesday, citizens in Maine, South Carolina, North Dakota and Nevada are set to cast their ballots in party primaries, designed to select which Democratic and Republican candidates advance to the final round of voting. But Maine has emerged as one of the most heated primary battlegrounds. With Democrats desperate to flip four seats in the US Senate, all eyes are on Republican Senator Susan Collins’s re-election campaign. Democrats are hoping to defeat her in November, but the party has fractured over controversies related to its leading candidate, Graham Platner. The race has become one of the most closely watched of the primary season. At stake in November is control of Congress, and each party is angling to put forward the strongest contender. Currently, the Republican Party holds slender majorities in both the Senate and the House of Representatives, but Democrats hope to wrest back control, in what would represent a major rebuke to President Donald Trump. State-level races are also in play during Tuesday’s primaries. Several in key swing states like Nevada could have outsized influence over election administration in the years ahead. Here are some of the key races to watch. Key Senate race in Maine to be decided The Democratic Party’s long-shot hope of retaking the Senate hinges on Maine, a lushly forested northeastern state largely bordered by Canada and the Atlantic Ocean. The primary vote on Tuesday is widely expected to result in Platner advancing as the Democratic champion for November’s midterms. If so, he will take on the longtime incumbent, Republican Senator Collins, who is considered vulnerable to defeat. Polls have consistently shown the 41-year-old progressive narrowly defeating Collins in the midterm in November. Platner has appealed to left-wing voters with his positions in favour of universal healthcare and ending US support for Israel. But a slate of recent reports about his past relationships has threatened to chill the enthusiasm for his campaign. An oyster farmer and former US Marine, Platner has faced accusations of “unsettling” behaviour towards women, including an alleged incident where he twisted one romantic partner’s arm. Platner has denied that allegation. He has also permanently removed a skull-and-bones tattoo that critics likened to a Nazi symbol, saying he did not know its source.

Still, in Tuesday’s primary, Platner is expected to handily beat his closest Democratic rivals: environmental consultant David Costello and Governor Janet Mills, who will remain on the ballot despite announcing her withdrawal from the race. Contests for Maine’s House and governor seats But Maine boasts other nationally significant races, too. That includes the contest for the House seat left open after Democratic Representative Jared Golden announced he would not run for re-election. Golden has represented Maine’s 2nd congressional district since 2019, and he has proven adept at retaining support, even though his coastal district leans conservative. If Republicans pick up his seat, it would be a boon to the party’s effort to maintain control of the House. Republican Governor Paul LePage is running uncontested in his party’s primary to replace Golden. Four Democrats, meanwhile, are competing in their party primary to take him on. They include state Senator Joe Baldacci, state auditor Matthew Dunlap, social worker Paige Loud, and congressional staffer Jordan Wood. All four have charted a more leftward course than the outgoing lawmaker. Maine’s governor’s race is also open, with Mills, a Democrat, leaving her post at the end of the year due to term limits. The chance to win the governor’s mansion in November has attracted a crowded field to both party primaries. Each race features notable political scions. On the left, there is Angus King III, whose father currently represents the state in the US Senate, as well as Hannah Pingree, the daughter of a current member of Congress. Running on the right is healthcare executive Jonathan Bush, a cousin of former President George W Bush. Election administration looms large in Nevada Nevada has remained a deeply purple state in recent years, leaning neither left nor right. Democratic presidential contenders have narrowly won the state from 2008 to 2020, but President Donald Trump broke the streak in 2024, carrying just over 50 percent of the vote. A staggering 45 percent of Nevada’s voters are registered as independents. That means they hold outsized sway in November’s midterm vote, but they will not be able to cast a ballot in Tuesday’s closed primaries, which are limited to party members only. The sprawling western state is home to about 3.2 million residents. In the middle of its desert landscape sits Las Vegas, a global gambling and entertainment destination. But the state has become a political football, in part because of its narrow partisan divide.