Left-wing filmmaker Michael Moore has warned Americans that life under Donald Trump will be “worse” than they thought.

Insisting that the US President was “honestly” carrying out the agenda on which he campaigned, he urged voters to leave their “bubble”.

“Anybody who's still in their bubble, thinking, you know, 'It won't be that bad,' trust me, it will be as bad as that and worse," he told CNN’s Don Lemon. "They're just doing it because they're honest.

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“He's going to do everything he said he's going to do."

Moore added that the Trump administration would reopen the investigation into Hillary Clinton's use of a private email server in her New York home while she was secretary of state, between 2009 to 2013.

The FBI closed its investigation the Democratic nominee shortly before the presidential election, only to reopen it less than two weeks before voters went to polls - a move which some commentators claimed caused irreparable damage to her campaign.

Two days before the vote, FBI director James Comey said investigation had come to the conclusion that no prosecutable offence committed.

Moore claimed that the Trump administration was "going to go after the Hillary server thing, starting next week, again."

He said: "That whole 'lock her up' thing, they weren't done with that, and they're not done with anything they said they were going to do. I was one of the people that believed that whatever he was saying was true.

“When he says that he's going to dismantle the [Environmental Protection Agency] and the Department of Education, he's actually going to, and has, put in people whose job."

Moore added that Mr Trump's chief strategist, Steve Bannon used the word "deconstruct, which is a nice way of saying 'demolish'. Demolition, that's what they're in for."

He added: “When people say he lies, it's a different kind of lying. When he says he believes he can shoot somebody in the middle of Fifth Avenue and get away with it, he's proven that over and over again.”

Administration members like Mr Bannon are “very clear about their agenda,” Moore said.

“They are nationalists," he said. "They believe in economic nationalism, they believe in the deconstruction of our government, which is essentially saying they believe in anarchy. They consider the government the enemy.”

But the Michigan native added that he was encouraged by what he called “the resistance” to Mr Trump’s policies, including Women’s Marches and footage of voters holding politicians to account at town hall meetings.

He said: “All of this stuff is so powerful. It's so exhilarating to see so many people who've never gotten involved politically in their lives are now out there, at these meetings, in the streets.”

Speaking about the upcoming election for chairman of the Democratic National Committee, he said the party must part ways with its “old guard”.

He said: “They've got to go. We need fresh blood in there. What's the message to young people?”

Mr Bannon told an audience at the Conservative Political Action Conference that his boss is “maniacally focused” on implementing his campaign promises.

He derided the media as the “opposition party” and offered a counter-narrative to what has been largely reported as a tumultuous first month for the Trump administration.

He assured conservatives earlier this week that White House operations were running smoothly and more “methodically” than portrayed.