Will negative attacks work in Iowa? Two commentators explain

Things have taken a decidedly negative turn with 2012 GOP presidential candidates in Iowa, but no candidate has been able to land a "telling" blow.

With less than three in 10 Iowans saying they've made their final choice already, there are an awful lot of hearts and minds still to be won in the Hawkeye State.

This morning on American Morning, we ask conservative commentator Tara Wall and democratic strategist Maria Cardona to break down the GOP race as it stands and look at the week ahead in Iowa.