Dec. 14 — Sens. Raphael Warnock and Rand Paul

Sens. Raphael Warnock (D-Ga.) and Rand Paul (R-Ky.) join in the aftermath of a shooting at Brown University. Tom Winter updates on the suspect in custody. Steve Kornacki breaks down a new NBC News Decision Desk poll. Lanhee Chen, Jonathan Martin, Amna Nawaz and Neera Tanden join the roundtable.