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Foster Friess, the donor who poured $2.1 million into the pro-Santorum Red, White, and Blue Fund, said Friday he would support Santorum for president if the former Pennsylvania senator ran again.

"Yes," Friess said Friday, according to ABC News.

"On the national security front, Rick Santorum is superior to any candidate I know," Friess added.

After Mitt Romney clinched the 2012 Republican nomination for president Friess donated $100,000 to the pro-Romney super-PAC Restore Our Future.

Santorum himself has left open the door of another presidential run. He has remained politically active, publicly opposing President Obama's nomination of former Sen. Chuck HagelCharles (Chuck) Timothy HagelTrump's pick for Pentagon chief wins allies on Capitol Hill Trump pick brings scrutiny to 'revolving door' between Pentagon, industry Overnight Defense: Senators plan 22 resolutions to block Saudi arms sale | Trump defends transgender military plan | Trump, lawmakers prep to mark D-Day anniversary MORE (R-Neb.) for secretary of Defense and supporting a number of conservative causes.

Santorum was also set to appear at the anti-abortion rights March for Life on Friday.