Democratic presidential race focuses on Iowa caucuses as field continues to narrow
Julián Castro, the former housing secretary and San Antonio mayor, has dropped out of the Democratic presidential primary. The news comes as the focus of the race shifts to Iowa, where Senator Amy Klobuchar completed a tour of every county in the state ahead of its first-in-the-nation caucuses. CBSN political reporter Caitlin Huey-Burns joined CBSN with a snapshot of where things stand in the race for the White House.