GOP mega-donor Charles Koch said in an interview to be aired Sunday on ABC News' This Week that "it's possible" that electing another Clinton to the White House would be preferable to a Republican alternative.

It's a nightmare scenario for Republicans, but conservative billionaire Charles Koch says "it's possible" Hillary Clinton could make a better president than the remaining candidates in the GOP primary.

Koch, one of the most influential and controversial forces in Republican politics, said in an exclusive interview with ABC News to air Sunday on "This Week" that he believed Bill Clintonwas a better president "in some ways" than George W. Bush.

"In other ways, I mean [Clinton] wasn't an exemplar. But as far as the growth of government, the increase in spending," Koch said. "It was 2.5 times [more] under Bush than it was under Clinton."

Democrats have long vilified brothers Charles and David Koch and their multi-million dollar political network, but both maintain they haven't yet spent a dollar for or against any candidates in the 2016 presidential primary.

In his interview, Koch said that is a result of his disgust with the rhetoric in the Republican primary, and he even suggested Clinton could be a better choice for the country than the remaining crop of GOP candidates.

"It's possible," Koch said, but didn't say whether he could see himself supporting Clinton in the 2016 cycle.

"We would have to believe her actions would be quite different than her rhetoric. Let me put it that way," he said.

Koch was never going to be an enthusiastic supporter of either Trump or Cruz given his libertarian leanings. But when you hold the purse strings to the tune of $200 million, a hint that Koch may support Hillary Clinton should set off an earthquake in Republican circles.

Koch and Rand Paul are backing criminal justice reform, a position that puts them at odds with many conservatives. He also wants to end ethanol subsidies and corporate welfare of all kinds. If he could stomach Trump's bombast, his position on many issues wouldn't be far from the reality TV star's positions. 

Can a GOP candidate win without the support of Koch and his deep pockets network? I think the more relevant question is can they even win with it.