Newt Gingrich says, when it comes to his campaigning, he has been conducting an experiment. The former House speaker says he's been running a positive campaign as he competes for the Republican nomination. And if voters who say they hate negative campaigning practice what they preach, Gingrich says he'll do better than expected in Iowa.
STEVE INSKEEP, HOST:
But Gingrich also says he needs to set the record straight, and that means firing back at Mitt Romney.
Concluding that he can win the Iowa caucuses, former Massachusetts Governor Mitt Romney spent the weekend campaigning in western Iowa, a mostly conservative region. After months of making only periodic visits to the state, Romney is making an aggressive final push through Iowa.