Hello and welcome to the US politics live blog.

Lawmakers have given their support to the supreme court’s rejection of Donald Trump’s bid to restrict mail ballots for the midterm elections.

The decision capped a flurry of last-minute legal action with voting already underway, with states allowed to continue sending out mail ballots under the same processes used for years.

Election officials have said there was simply no way to carry out a complete overhaul in the weeks before the midterms. Alabama, North Carolina and Wisconsin began sending mail ballots to voters over the past week while the new system was still not active.

Washington’s secretary of state Steve Hobbs, a Democrat, said the decision means work “to carry out a safe, secure, and accurate election” can continue ‘without having to upend our election processes to meet unrealistic ballot mail requirements.”

In Arizona, another largely vote-by-mail state, Democratic secretary of state Adrian Fontes said “it is crucial for us to continue rejecting the notion that access and security are mutually exclusive when it comes to running strong elections.”

Utah Lt Gov Deidre Henderson, a Republican serving as the state’s chief election officer, said on social media that the supreme court’s decision means “Utahns can have confidence that the 2026 election will proceed as normal.”

In other developments:

  • Mitch McConnell, the 84-year-old former Senate majority leader from Kentucky, was seen in Washington for the first time in months on Monday, minutes before his office released a statement saying that he was back at work.

  • With a slip of the tongue reminiscent of Joe Biden, Gavin Newsom, California’s Democratic governor, told CNN that he would not run for president in 2028 if his fellow Californian, former vice-president Kamala Harris, decides to run again, since “I know what that means: I know her base of supporters, I know her friends, the zen diagram on that is just pure crossover.”

  • Donald Trump claimed there is a “SICK conspiracy” against artificial intelligence and data centers in response to the growing calls for greater checks on AI development.

  • In a statement posted on social media, Barack Obama, the former US president, called for the pace of AI development to be slowed to allow time for the federal government to develop regulations to address “serious safety concerns”.