Julian Castro, the mayor of San Antonio, Texas, has the role of keynote speaker at the Democratic National Convention tonight. He has an even more important function: validator.
Castro, 37, a Stanford University and Harvard Law School graduate who is the first Hispanic convention keynoter, was re- elected last year to a second term with 82 percent of the vote in a city of 1.36 million people -- 63.2 percent of whom are Latino, according to the census.
“The main takeaway is, in order for Obama to