Tonight's guests:
- Jon Erpenbach, Wisconsin state senator
- Nicolle Wallace, Republican strategist
- Beth Fouhy, senior editor for MSNBC.com
Tonight's links:
Scott Walker Clarifies His Comparison of Union Activists and Islamic State Terrorists
David Koch Signals a Favorite: Scott Walker
2016 Republican Presidential Nomination
Scott Walker: End birthright citizenship
Scott Walker Says He's Not Seeking to Repeal 14th Amendment
Scott Walker's Full 'Meet the Press' Interview
Campaign Says Scott Walker Not Advocating Canada Border Wall
Cutting Losses, Kochs to Sell Scott Walker
NATIONAL: TRUMP HOLDS LEAD, CARSON 2nd (pdf)
Wisconsin Gov. Walker to attend Michigan Republican gathering this weekend
Scott Walker cancels GOP speeches to spend time in Iowa, South Carolina
Poll: Fiorina rockets to No. 2 behind Trump in GOP field
Scott Walker set to exit GOP presidential race
Walker super PAC brings in $20 million haul
Annette Bosworth sentenced to 3 years probation
Dark-money group behind Christine Jones ads may have violated law
VETERANSFORASTRONGAMERICAORG - Automatic Revocation of Exemption Information
FEC filing: Veterans for a Strong America Action Group
Ben Carson Baffles CNBC’s Harwood on Gays: ‘I Don’t Know What You’re Talking About’
Ben Carson Says He's Open To Drone Strikes On American Soil To Fight Immigration
Carson says wants drones to blast caves, not people at U.S.-Mexico border
White House slams Carson's 'offensive views' on Muslims
Secrets of the 'Aisle Hogs': How to Score the Best Seats at the State of the Union
Members Will Be Blocked 2 Ways From Touching Pope Francis (Video)