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Castro to go after Romney in keynote

San Antonio Mayor Julian Castro will go after the Republican presidential ticket for its economic philosophy and try to paint the pair as out of touch.

Julian Castro is the Mayor of San Antonio, Texas and the keynote speaker at the Democratic National Convention in Charlotte. He spoke to NBC News about the importance of family and their influence on his political beliefs.

"Republicans tell us that if the most prosperous among us do even better, that somehow the rest of us will too,” Castro, 37, will say, according to excerpts released by the Democratic National Convention Committee. “Folks...we've heard that before. First they called it 'trickle-down.' Then 'supply side.' Now it's 'Romney/Ryan.' Or is it 'Ryan/Romney'? Either way, their theory has been tested. It failed. Our economy failed. The middle class paid the price. Your family paid the price. Mitt Romney just doesn't get it."

Obama Senior Campaign Advisor Robert Gibbs join Andrea Mitchell Reports to preview day one of the DNC.

He will note the value of hard work, but add that the country needs to “invest” and help people along the way. 

"Texas may be the one place where people actually still have bootstraps,” he will say, “and we expect folks to pull themselves up by them. But we also recognize there are some things we can't do alone.”

He will add: "Mitt Romney, quite simply, doesn't get it. A few months ago he visited a university in Ohio and gave the students there a little entrepreneurial advice. 'Start a business,' he said. But how? 'Borrow money if you have to from your parents,' he told them. Gee -- why didn't I think of that?" 

The Social Media Story of DNC 2012

He will also lavish praise on President Obama

"Now, like many of you, I watched last week's Republican Convention,” he will say. “They told a few stories of individual success...we all celebrate individual success. But the question is, how do we multiply that success. The answer is President Barack Obama."

He adds: "Four years ago, America stood on the brink of a Depression. Despite incredible odds and united Republican opposition, our President took action. And now we've seen 4.5 million new jobs. He knows better than anyone that there's more hard work to do. But we're making progress. And now we need to make a choice. It's a choice...between a country where the middle class pays more, so that millionaires can pay less... or a country where everybody pays their fair share. It's a choice between a nation that slashes funding for our schools and guts Pell grants... Or a nation that invests more in education. It's a choice between a politician who rewards companies that ship American jobs overseas...Or a leader who brings jobs back home.

"This is the choice before us. And to me, to my generation, and for all the generations that will come after us, our choice is clear. Our choice is a man who's always chosen us. A man who already is our President -- Barack Obama."

For more, read: "Who is Julian Castro and can he deliver in the spotlight?"

*** UPDATE *** Ryan Williams, of the Romney campaign, responded this way: “Middle class families understand that they are not better off than they were four years ago because President Obama’s liberal policies have failed to turn around the economy. The president has wasted hundreds of billions of dollars on a big government agenda that has resulted in record debt, declining salaries and 42 consecutive months of unemployment above 8%. Mitt Romney and Paul Ryan have a plan that will strengthen the middle class by reforming our tax code, reducing excessive government regulations and creating 12 million jobs over the next four years.”