On "Meet the Press": Former Secretary of State Colin Powell.
On "Fox News Sunday": Sens. Richard Blumenthal (D-CT) and Kelly Ayotte (R-NH).
On CNN's "State of the Union": Sens. Chris Murphy (D-CT), Joe Manchin (D-WV), NRA President David Keene, former Utah Gov. Jon Huntsman.
On ABC's "This Week": Sens. Jack Reed (D-RI), Bob Corker (R-TN) and Manchin, Huntsman.
On CBS' "Face the Nation": Sens. Manchin, John McCain (R-AZ), retired Gen. Stanley McChyrstal, Los Angeles Mayor Antonio Villaraigosa.