Gingrich divorced Ginther in 2000 and soon married his third wife, Callista Bisek, a former congressional aide who was in her 20s when she and Gingrich began their affair.
"There are times that I have fallen short of my own standards," Gingrich said. "There's certainly times when I've fallen short of God's standards and my neighbors' standards. But I think my job is to try to do for my country -- and on a very personal level for my children and for my grandchildren and for their future -- to try to do everything I can to be a servant in helping this country deal both with the domestic challenges to our very identity, and that's what rediscovering God in America is all about, and to foreign challenges to our very survival. … I hope that people will see me in that context."
Among the three Republican front-runners -- thrice-married former New York Mayor Rudy Giuliani; twice-married Sen. John McCain, R-Ariz.; and Gingrich -- there are eight current and past wives.
It's a point underlined by the wife of former Massachusetts Gov. Mitt Romney, fourth in many polls, who said, "The biggest difference between Mitt Romney and the other candidates," is that her Mormon husband "only had one wife."