Secretary of the Department of Housing and Urban Development, Julian Castro, is the second person in President Barack Obama's cabinet and first major Latino to endorse Clinton.
"Having watched and respected for years now Secretary Clinton, I know that she appeals to Americans of all backgrounds and colors, different perspectives and walks of life," Castro said with Clinton standing next to him at an event in San Antonio, Texas.
Clinton, who is riding a wave of momentum after a well-regarded debate performance in Las Vegas Tuesday night, spoke to an enthusiastic crowd where she called Castro, who is the popular former mayor of San Antonio, a great leader who "gives a really good speech."
Right before the rally, Clinton was asked about Castro as a running mate should she win the nomination. And it seems like the thought probably crossed her mind...This endorsement is special for several reasons. One, the 2012 Democratic Convention keynoter was a terrific mayor for the seventh largest city in the country and remains very popular in his current job in Obama's cabinet. Two, he just might be the next Vice President (and I'm totally on board with that idea). And three...I was there to see it in person.