Third Democratic debate wraps up in Houston
9:01pm PDT - September 12th, 2019 beto o'rourke - CBS NewsJulián Castro took on Joe Biden and Beto O'Rourke doubled down on his vow to take assault rifles while health care, immigration and gun control took center stage at the third Democratic debate. CBS News' Ed O'Keefe and Caitlin Huey-Burns and CBSN political an…