Immigration hawks are warning Mitt Romney, the presumptive Republican nominee, not to moderate the hard-line stances on border security and deportation that he took during the GOP primary.

Conservatives who focus on an anti-illegal immigration message are worried that Romney will move toward the political center in the general election election campaign after he suggested the GOP develop a “Republican DREAM Act.”

“Any reversal on these positions would destroy his credibility, alienate conservative American voters who outnumber Latino voters, and exert the same pressures on Mitt Romney that destroyed John McCain and Rick Perry’s campaigns,” said William Gheen, the head of the anti-illegal immigration group ALIPAC. “Not only would a Romney shift on immigration hurt him among Americans concerned about illegal immigration but it would signal that he cannot be trusted on any issue or topic whatsoever.”