Expect former Speaker of the House Newt Gingrich to end his hemming and hawing and joking about needing $30 million in unmarked twenties by November 1. He's running for president. Sources tell Radar it's all but a done deal: Newt's in.

Radar has learned from one insider familiar with the former speaker's schedule that Gingrich is canceling corporate gigs left and right to get in line with campaign finance rules. Another Gingrich insider echoes this sentiment, and sources hint that after Halloween, Newt will go into full-time campaign mode. When people call to book Gingrich for events, says an insider, "We're telling them 'We can only confidently book Newt until November 1st.'"