Newsmax, the conservative magazine and Web site, will show a 30-minute special on Mr. Gingrich throughout the weekend in all of Iowa’s major television markets. The program is hosted by Michael Reagan, son of the former president, and makes the case that Mr. Gingrich is the strongest candidate to carry forward Ronald Reagan’s legacy.

“Millions of dollars in negative ads have been spent against him,” Mr. Reagan says. “But let’s discuss the real Newt Gingrich.” Soft music then starts to play and the camera cuts to a black and white photograph of Mr. Gingrich as a boy.