This live blog is now closed.

• Sign up for the US Breaking News email

A US military strike on an alleged drug trafficking boat in the Caribbean on Tuesday killed four people, officials said.

US Southern Command (SOUTHCOM) said in a post on X that the strike targeted a vessel “operating along established narco-trafficking routes in the Caribbean.”

The incumbent senator Dan S Sullivan has condemned ex-school teacher Dan J Sullivan, claiming he is running at the behest of Democrats to confuse supporters

Dan S Sullivan, the Republican senator, will be joined on the November ballot in Alaska by a challenger with a nearly identical name from the same party, election officials confirmed on Tuesday, adding a twist to what is expected to be one of the most hotly contested races of the midterms.

The Republican senator is running for a third term against Democrat Mary Peltola, a former US House representative whom polls show is neck-and-neck with him in a state that hasn’t sent a Democrat to the Senate since 2008.