Newt Gingrich took shots at Mitt Romney and called for Rick Santorum’s supporters to join him now the former senator has suspended his presidential bid.

“There’s no question that Romney’s the frontrunner, but he has not locked this up,” Gingrich said during a phone call on Sean Hannity’s radio show. “People forget that Reagan had lost every primary until he got to North Carolina,” Gingrich also said. The North Carolina is scheduled for May 8th.