Donald Trump's candidacy's divisive impact on Republicans came to the fore again Wednesday as deep-pocketed GOP donor Paul Singer warned Trump's economic proposals would cause a worldwide "depression" should he become president, reports CNBC.

"The most impactful of the economic policies that I recall him coming out for are these anti-trade policies," Singer said during a panel discussion at the Aspen Ideas Festival in Colorado. "I think if he actually stuck to those policies and gets elected president, it's close to a guarantee of a global depression, widespread global depression."

Singer, the head of the $27 billion Elliott Management hedge-fund firm and who describes himself as a libertarian, supported Florida Sen. Marco Rubio for the Republican nomination during the primaries. Last year, Singer donated $100,000 to the party. But in April he gave $1 million to the anti-Trump group Our Principles PAC.

Despite his personal wealth, Trump had $1.3 million in his campaign war chest at the end of last month, according to Politico, paling in comparison to Hillary Clinton's $42.5 million.

Last month, The New York Times reported that casino tycoon Sheldon Adelson pledged, in a private meeting, that he was willing to spend $100 million on Trump's campaign, but it seems Trump has seen little of that money. The Forward reported June 23 that Adelson hadn't made any political contributions this year.

Charles and David Koch, the Republican billionaire industrialist siblings, have focused their considerable resources toward GOP Senate campaigns to keep control of Congress rather than win the White House, according to The Washington Post.

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