(CNN) - At a Tea Party rally Sunday on the U.S.-Mexico border in support of tough immigration laws, Arizona Senate candidate J.D. Hayworth slammed his opponent, Arizona Sen. John McCain, and turned McCain's words back on the veteran senator. On a ranch in Hereford, Arizona, and with the border fence visible several hundred yards behind him, Hayworth also praised Arizona's new immigration law that was signed by the state's governor, who has spent the last two days campaigning with McCain. Pulling a word from a McCain letter on immigration which first surfaced in April, Hayworth said it was time to...