1:06pm: The Iowa Caucus is tonight, and some candidates say they wouldn't be on the stump if not for spousal encouragement. We'll speak with journalists who've been covering the campaign thus far about the role of candidates' spouses and other family members in running for office.1:12pm: On the campaign trail, GOP candidates like to compare themselves to Ronald Reagan—especially his record as a tax-cutter. But this weekend, 60 Minutes became the latest news organization to put that record under the microscope. In an interview with House Majority Leader Eric Cantor, reporter Leslie Stahl pointed out that Reagan did compromise when he raised taxes. We'll speak to Julian Zelizer, professor of history and public affairs at Princeton University, about Reagan's real record.1:35pm: Nearly a year after the earthquake and tsunami devastated Japan, the damaged nuclear reactors at the Fukushima Power Plant are said to be under control, but the huge task of cleaning up the contamination is just beginning. We’ll find out why progress is so slow.1:50pm: Joe Farris is famous for his urbane cartoons in The New Yorker, but you may see those cartoons in a new light after you take a look at his new book. It's called A Soldier's Sketchbook: From The Front Lines of World War II. It features watercolor sketches of battlefields and fellow soldiers who didn't make it home, plus many of the hundreds of letters he wrote home while he was in the service. We’ll talk to him about his work and his experiences overseas.