Former vice president Dick Cheney will appear at a fundraiser for Donald Trump’s 2020 campaign, according to an invitation for the event, in a sign that the Republican establishment will publicly back his re-election bid.

Mr Trump won the Republican nomination in 2016 as an outsider and has often clashed with senior figures in the party, such as Mitt Romney and the late John McCain.

However, an invitation to a luncheon fundraiser in Jackson, Wyoming, shows Mr Cheney will appear alongside Ivanka Trump, Jared Kushner and acting White House chief of staff Mick Mulvaney, according to The Washington Post.

He will attend the event with his daughter Liz Cheney, who is a Republican congresswoman for Wyoming, for the fundraising group “Trump Victory”.

Mr Cheney, who was George W Bush‘s vice president, previously said Mr Trump’s 2015 call for a “a total and complete shutdown of Muslims entering the United States,” went “against everything [America] stands for and believes in”.

Earlier this year, Mr Cheney also clashed with Mike Pence, the current vice president, over the administration’s foreign policy, criticising Mr Trump’s hard-line approach towards US allies in Nato.

The invitation reportedly does not list the official titles of Mr Mulvaney, Ms Trump or Mr Kushner and insists that “their participation in the event is not a solicitation of funds”.

Officials for the Trump campaign confirmed the event but would not say how much tickets would cost.

Trump Victory has been known to charge up to six-figure amounts for tickets to its events.

“Representative Cheney is honoured to be co-hosting this event and working hard to support President Trump’s re-election,” a spokesperson for Ms Cheney said in a statement.

“The president’s policies are benefiting Wyoming and the nation.”

The structure of the Trump Victory committee, which raises funds for both the Trump 2020 campaign and the Republican National Committee (RNC), has shown how the president has been accepted into the Republican Party’s mainstream.

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By merging his re-election campaign with the national party, Mr Trump has become less vulnerable to an Republican opponent challenging him in the 2020 primary.

However, linking the RNC to Mr Trump’s divisive presidency may be risky in the long-term for the Republican Party.

In recent weeks, billionaire Stephen Ross has faced calls for a boycott of his Equinox luxury fitness company over his plans to hold a fundraiser for Mr Trump in the Hamptons.

Additional reporting by agencies