Discuss as:

Programming notes

*** Tuesday’s “Daily Rundown” line-up: Ohio supporters square-off with pro-Santorum Ohio Atty. Gen. Mike DeWine, pro-Romney Rep. Jim Renacci, pro-Gingrich former Rep. Bob McEwen Rep. Marsha Blackburn (R-TN), whos staying neutral so far, on todays Tennessee primary NBCs David Gregory on the big picture facing the GOP field A deep dive into how Romney can rack up 200+ delegates tonight More 2012 analysis with Republican strategist Nicolle Wallace, Center for American Progress Action Fund President and former Rep. Tom Perriello (D-VA), and TheGrio.coms Joy-Ann Reid.

*** Tuesday's "Jansing & Co." line-up: MSNBC’s Chris Jansing interviews Dan Rather, National Journal’s Major Garrett, Santorum spokeswoman Alice Stewart, Marc Morial, TN GOP Chair Chris Devaney, and former Arkansas Sen. Blanche Lincoln (D-AR).

*** Tuesday’s “MSNBC Live with Thomas Roberts” line-up: MSNBC’s Thomas Roberts talks with MSNBC’s Ed Schultz, MSNBC’S Chris Hayes, Ron Reagan, Democratic strategist Alicia Menendez, former Huckabee Campaign Manager Chip Saltsman, Richard Wolffe, Michelle Goldberg, and Aram Roston.

*** Tuesday’s “NOW with Alex Wagner” line-up: Alex Wagner’s guests include former New York Gov. George Pataki (R), Politicos Maggie Haberman, Deputy NYC Mayor & Fmr. Hillary Clinton Adviser Howard Wolfson, former George W. Bush Adviser Dan Senor, NBC News Political Director Chuck Todd, and Democratic Pollster Peter Hart.

*** Tuesday’s “Andrea Mitchell Reports” line-up: In addition to coverage of Obama’s press conference, NBC’s Andrea Mitchell interviews Chuck Todd, Tom Brokaw, Robert Gibbs, and Virginia Gov. Bob McDonnell.

*** Tuesday’s “News Nation with Tamron Hall” line-up: MSNBC’s Tamron Hall interviews The Hill’s AB Stoddard, political analyst Earl Ofari Hutchinson, syndicated radio host Steve Deace, and Ohio Republican strategist Terry Casey