Former Housing and Urban Development Secretary Julian Castro, the former mayor of San Antonio, Texas, was on the short-list to be Hillary Clinton's running mate four years ago. He is working to position himself as a candidate suited to challenge President Trump.
"What he's trying to do is, he's trying to split people along racial, and ethnic and religious lines. His specialty, if you will, in politics is division. Trying to just amp up a base. He's the biggest identity politician that we've had over the last 50 years."