Romney's deficit also now stands 15 points greater than the one posted by Sen. John McCainJohn Sidney McCainLawmakers worry about rise of fake video technology Democrats put Dreamers and their party in danger by playing hardball Trump set a good defense budget, but here is how to make it better MORE (R-Ariz.) against President Obama in the 2008 campaign. Romney's struggle with personal favorability seems particularly dramatic among Hispanics, where 53 percent say they hold a negative opinion of the candidate, versus 23 percent who see him favorably.

It also appears Romney's outreach attempts have backfired. More than six in 10 Latinos say what they've heard about Romney in the last couple of weeks gives them a less favorable opinion of the candidate.

Still, there is evidence Romney is trying to chip away at Obama's advantage. On Monday, Romney said that illegal immigrants who receive temporary work permits because of the recent policy change by President Obama would be allowed to keep them under a Romney administration.

"The people who have received the special visa that the president has put in place, which is a two-year visa, should expect that the visa would continue to be valid. I'm not going to take something that they've purchased," Romney told the Denver Post in an interview. "Before those visas have expired we will have the full immigration reform plan that I've proposed."

Earlier this year, the president issued an executive order that halted deportation proceedings against illegal immigrants who were brought to the United States as children and who graduated from high school and avoided arrest.

Romney had not said before what he would do about the president's executive order, saying simply that he would work for a comprehensive and long-term immigration solution.

He reiterated that position Monday in his interview with the Post.

"I actually will propose a piece of legislation which will reform our immigration system to improve legal immigration so people don't have to hire lawyers to figure out how to get here legally," Romney said. "The president promised in his first year, his highest priority, that he would reform immigration, and he didn't. And I will."