On NBC's "Meet the Press": Massachusetts Gov. Deval Patrick (D) and Sen. Kelly Ayotte (R-NH).

On "Fox News Sunday": Obama campaign adviser Robert Gibbs and Republican Wisconsin Gov. Scott Walker. 

On ABC's "This Week": RNC Chairman Reince Priebus and Obama campaign adviser David Axelrod. 

On CNN's "State of the Union": Sens. Dick Durbin (D-IL) and Lindsey Graham (R-SC) and Rep. Mike Rogers (R-MI)

On CBS' "Face the Nation": Former President Bill Clinton.