For Gingrich, A Week Of Attacks And Falling In Polls

It's been a week of marathon campaigning for GOP presidential candidate Newt Gingrich: five or six campaign events each day, hitting Rotary meetings, pizza restaurants and coffee shops.

With the caucuses just days away, it's time for closing arguments in Iowa. Gingrich says his is that he's a supply-side conservative with experience both in balancing the budget and in making government work.