GETTY Trump has come under fire from within his own party over his controversial comments

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US Chamber of Commerce chief strategist Scott Reed claimed the party is in "a new level of panic" as he called for a "serious reset" of the property tycoon's campaign. And it was also claimed some Republicans wanted to set up a "plan B" candidate if Mr Trump were to pull out of the race. Republican Newt Gingrich, former New York mayor Rudy Giuliani and party chairman Reince Priebus are all reportedly considering an "intervention" meeting with the brash White House hopeful. WHAT WILL HAPPEN IF TRUMP DROPS OUT?

GETTY Newt Gingrich, right, has said Hillary Clinton will beat Donald Trump

GETTY Mr Trump told supporters in Florida that Hillary Clinton 'founded ISIS'

Gingrich claimed Trump stood no chance of beating rival Hillary Clinton in November’s election. He said: "The current race is which of these two is the more unacceptable, because right now neither of them is acceptable. "Trump is helping her to win by proving he is more unacceptable than she is."

Trump is helping her to win by proving he is more unacceptable than she is Newt Gingrich

And Mr Trump's children reportedly tried to calm a "livid" Priebus, who is reportedly furious with the behaviour of the 70-year-old tycoon. Trump, who stormed to victory in the Republican presidential nomination race, sparked outrage after criticising the family of a slain Muslim US soldier.

Donald Trump’s top tweets Mon, March 7, 2016 White House hopeful Donald Trump has sparked controversy on the campaign trail and social media. Here are his best tweets Play slideshow Getty Images 1 of 22 Donald Trump speaks during a campaign rally at the Georgia World Congress Center

Ghazala Khan stood alongside her husband Khizr as he condemned the billionaire's policies on Muslims at last week's Democratic Party National Convention. The couple's son, US Army Captain Humayun Khan, was killed in Iraq in 2004 by a suicide car bomb.