NBC's "Meet the Press": Govs. John Kasich (R-OH), John Hinkenlooper (D-CO), Scott Walker (R-WI).
"Fox News Sunday": Sens. Mark Warner (D-VA), Mark Udall (D-CO), Rob Portman (R-OH), Ron Johnson (R-WI).
CNN's "State of the Union": David Axelrod, adviser to the Obama campaign, RNC Chairman Reince Priebus, Gov. Bob McDonnell (R-VA), former Gov. Ted Strickland (D-OH).
ABC's "This Week": Stephanie Cutter, deputy campaign manager for Obama's re-election effort, former House Speaker Newt Gingrich.
CBS' "Face the Nation": Chicago Mayor Rahm Emanuel and Sen. John McCain (R-AZ).