Actor Alec Baldwin has urged voters to "overthrow" the US government led by Donald Trump at the ballot box.

He was speaking at a fundraising dinner for the New Hampshire Democratic Party ahead of the November midterm elections and after returning to Saturday Night Live to portray the US president.

"The way we implement change in America is through elections. We change governments here at home in an orderly and formal way," he said. "In that orderly and formal way and lawful way, we need to overthrow the government of the United States under Donald Trump."

Mr Baldwin said on issue after issue that Republicans are destroyers, not builders.

He said: "There is a small cadre of people currently in power who are hell-bent on continuing a malicious immigration policy that has set this country up for human rights violations charges by the global community. This cadre has looted money from the federal treasury and deposited it directly into the bank accounts of their most ardent political supporters."

Mr Baldwin said Republicans "shrug" when it comes to gun violence, "spit in the face" of the rest of the world at the notion of changing outdated energy policies and offer neither hope nor solutions to people of colour "who seek a decent seat at the American economic table but instead are issued a prison term, or worse, a bullet".

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The recent confirmation of Supreme Court Justice Brett Kavanaugh showed that Republicans view women as undeserving of the same constitutional protections as men, Mr Baldwin said.

"They themselves are sons, husbands, fathers, and yet when the time arrived in the thick of the MeToo movement to set politics aside and establish that women's rights were more important than political expediency, they failed and it was ugly," he said.

Mr Baldwin's appearance in the state that holds the first presidential primary came hours before the premiere of his new talk show. The Alec Baldwin Show will feature one-on-one conversations with celebrities and cultural icons.

But Mr Baldwin said the show will not be overtly political. Asked if he would consider running for office himself, he did not rule it out but joked that his wife would be likely to divorce him.