From the Washington Post's translation of the ad:
"They want us to forget the insults we've put up with, the intolerance," the television ad's announcer says in Spanish as a picture of Rush Limbaugh appears onscreen with quotes of him saying, "Mexicans are stupid and unqualified" and "Shut your mouth or get out."
"They made us feel marginalized in a country we love so much," the ad continues. "John McCain and his Republican friends have two faces. One that says lies just to get our vote and another, even worse, that continues the failed policies of George Bush that put special interests ahead of working families."