Washington, D.C. ? In the latest sign of how unsettled the Republican presidential race is, Newt Gingrich says he’ll run if supporters come up with $30 million in three weeks.

“I don’t see as a citizen how you could turn that down,” Gingrich said on “Fox News Sunday.”

The fiery and controversial former speaker of the House has been a polarizing public figure.

Still, he believes he can mount a White House bid just a few months before voting starts because the GOP faithful have yet to solidify behind a candidate. Rudy Giuliani remains the leader, at 30 percent in the latest Gallup Poll, just 8 percentage points ahead of already-stumbling actor Fred Thompson.

Gingrich has tasked longtime adviser Randy Evans with launching the ambitious fundraising bid next Monday, and reporting back in three weeks.

“I want the commitments first,” Gingrich said. “If there is, in fact, enough people in the country who think we need this kind of approach and this kind of change-oriented policies, then I think I’d feel a responsibility to run.”