All In Agenda: What happened in Las Vegas?

1. On Sunday, MSNBC host Steve Kornacki revealed on his show, Up, that Hoboken is thinking of waiving attorney-client privilege for one of the city's attorneys so he can reveal new information about withheld Sandy relief money. Joining guest-host Steve Kornacki to discuss the revelations is President of Winning Strategies, Jim McQueeny.

2. So what happened over the weekend at the "Sheldon Primary" in Las Vegas? Any front runners? 

3. Monday was the last day to sign up for Obamacare without penalty. So, how'd it go? Steve Kornacki is joined by MSNBC host, Karen Finney, to discuss.

4. After former Massey Energy CEO Don Blankenship funded a documentary rehashing the Upper Big Branch mine disaster, lots of questions are still left unanswered. Joining Steve Kornacki to discuss the film is former Massey Energy CEO, Don Blankenship and Co-founder of Appalachian Emergency Health Campaign, Bob Kincaid