The entire future of American presidential elections could come down to one state – and billionaire George Soros is laying out big bucks to make sure it goes to Democrats forever.

Florida is a make-or-break state for Republicans, and liberal elites are convinced they've found the key to turning the state blue: Poor voters fleeing to the mainland from disaster-stricken Puerto Rico.

The island is a U.S. territory, not a state, so its residents can't vote in American presidential elections. But if they move to the mainland, it's a whole different story.

Puerto Ricans are different than the state's dominant Hispanic community, fiercely conservative Cuban-Americans, who vote overwhelmingly for the GOP.

"Puerto Ricans voted overwhelmingly for Hillary Clinton in 2016," NBC News reported.

The New York Times was so excited that it wrote last October, "An Exodus From Puerto Rico Could Remake Florida Politics."

Instead of trying to flip the whole country, Soros realized he could get more bang-for-his-buck by investing a tiny slice of his war chest getting them to the polls.

He spent a paltry $430,000 to establish United for Progress – a PAC dedicated to putting the state of Florida under permanent Democrat Party rule – just two months before the 2016 elections.

And he just doubled-down with another $450,000 in donations.

That's chicken feed to Soros, who's worth an estimated $8 billion, but he's betting it will pay huge dividends – like giving him control of the Oval Office.

If he turns Florida into a blue state, he could block the Republicans' path to the White House for years, or decades, to come.

"United for Progress's primary goal remains to build community-based political power and influence in the growing Puerto Rican and Latino constituencies," said Chairman Juan Marcos Vilar (who goes by "Marcos") in an e-mail to media outlets.

Power? At least Soros is honest about what he wants.