The US has literally 0 third party representation at the federal level and 10 state senators all libertarian. Even Bernie isn’t technically a third party he just is no party. So to be clear, having no party is far far better in the US than representing a third party even in a local election.

A second loss should be a death knell of the current Republican party. He won’t transition any of his power to Vance or any other Republicans. He could die and we still would see 10% of the Americans to vote for him in 2028 because his death was just media propaganda as far as they are concerned.