Clinton to say Obama policies are like his

First lady Michelle Obama told Democrats vision and values guide her husband as former President Bill Clinton was to nominate Barack Obama for a second term. "I've seen how the issues that come across a president's desk are always the hard ones -- the problems where no amount of data or numbers will get you to the right answer," Michelle Obama told the opening night of the Democratic National Convention Tuesday. "At the end of the day, when it comes time to make that decision, as president, all you have to guide you are your values, and your vision, and the life experiences that make you who you are," she said. "Barack knows what it means when a family struggles," she told 5,556 delegates, 407 alternates and hundreds of other attendees in nationally broadcast remarks in the Time Warner Cable Arena in Charlotte, N.C. "He knows what it means to want something more for your kids and grandkids. Barack knows the American dream because he's lived it, and he wants everyone in this country to have that same opportunity, no matter who we are, or where we're from, or what we look like, or who we love." The first lady's remarks didn't mention Republican presidential nominee Mitt Romney or his party. By contrast, keynote speaker San Antonio Mayor Julian Castro, 37, the first Latino to deliver a Democratic convention keynote address, argued Romney and running mate Paul Ryan offered ideas that have been shown not to work. "Their theory has been tested. It failed. Our economy failed," Castro said. "The middle class paid the price. Your family paid the price. Mitt Romney just doesn't get it." Clinton -- scheduled Wednesday to nominate the man who defeated his wife, Hillary Clinton, for the party nod four years ago -- was to argue in his prime-time keynote speech Barack Obama's policies mirror those that yielded an economic boom under Clinton. In a new ad playing in key swing states, Clinton says Obama's plans would rebuild the middle class. "That's what happened when I was president," he says. Barack Obama was to arrive in Charlotte Wednesday afternoon. He is to delivering his acceptance speech Thursday night.