Casino owner Sheldon Adelson recently donated $10 million to Mitt Romney’s Super PAC, but may be willing to donate far more to keep President Barack Obama out of the White House.

The billionaire told Forbes he is willing to spend $100 million or more to have a Republican candidate take office.  Adelson is by far the biggest political donor in American politics, U.S. News and World Report said.

Adelson believes that “no price is too high” to protect the U.S. from what he sees as Obama’s “socialization” of America, as well as securing the safety of Israel, according to a source close to Adelson.

Politically, Adelson’s donations have been heavily Republican.  Initially a Newt Gingrich supporter, he said he’d likely shift his financial support to the Republican front-runner if his candidate dropped out of the race.

Because of the Citizens United decision, there are no curbs on how much Adelson could give the pro-Romney Super PAC, Restoring Our Future, Forbes said.  Adelson is reportedly one of the 15 richest people in the world, worth nearly $25 billion.

Adelson’s wealth comes from his Las Vegas Sands Corp., a casino empire in Las Vegas and Southeast Asia. 

In an interview with Forbes, he said even though he doesn’t like the idea of one American potentially steering the fate of the presidential election, he is going to do it as long as it’s possible.