All In Agenda: CPAC is here!

1. The Crimean Parliament voted Thursday to become part of Russia. A referendum vote is scheduled for March 16. How did this happen? And who voted for it? Joining Chris Hayes to explain are VICE News Correspondent Simon Ostrovsky and Associate Professor at the New School Nina Khrushcheva.

2. What's behind the backlash against Debo Adegbile? Joining All In to explain is Partner at the Kapor Center for Social Impact and former NAACP President Ben Jealous.

3. The Congressional Black Caucus is calling for California Republican Rep. Darrell Issa to be stripped of his chairmanship of the Oversight and Government Reform Committee. Nevada Democratic Rep. Steven Horsford joins Chris Hayes with the details.

4. It's CPAC! Joining All In to give you today's highlights: Senior Fellow at the Heartland Institute Ben Domenech, Senior Contributing Writer at the Nation Michelle Goldberg, and Senior Fellow at Media Matters Eric Boehlert.