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Republican presidential contender Mitt Romney is hammering away at rival Rick Perry on immigration again – this time in a new web ad that seeks to portray the Texas governor as having views that serve Mexico’s interests.

Romney's latest ad features former Mexico President Vicente Fox thanking Perry for a Texas law that allows undocumented immigrants to attend public colleges at in-state tuition rates.

The ad shows Fox saying: “I want to publicly recognize Gov. Perry and the state of Texas by having taken that step forward when you decided to give access to Mexican migrants to universities In Texas.”

The video also links Perry’s immigration positions to President Obama, House Democratic Leader Nancy Pelosi and Senate Majority Leader Harry Reid.

It shows part of the GOP debate that was held in Orlando in which Perry said that people who oppose allowing undocumented immigrants to pay the same tuition as other residents of the state where they live “don’t have a heart.”

Perry later expressed regret at having said that in-state tuition opponents were heartless, but reaffirmed his support for the Texas law.

Perry took pains, however, to show that he is not soft on immigration. He said he opposed so-called sanctuary cities, which have policies urging government workers not to report undocumented residents to immigration officials.

Perry said he supports strong border control, but as long as it consists of people guarding the border as well as air patrols.

Minnesota Rep. Michele Bachmann, another GOP presidential contender, also released a video on Friday assailing the portrayal of opponents of in-state tuition as heartless.

Follow Elizabeth Llorente on Twitter: @LlorenteLatino

Elizabeth.Llorente@FoxNewsLatino.com

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