Marco Rubio is not echoing Donald Trump's call to repeal the constitutional provision that automatically grants citizenship to individuals born in the United States.

"I'm open to doing things that prevent people who deliberately come to the U.S. for purposes of taking advantage of the 14th Amendment, but I'm not in favor of repealing it," Rubio, a Florida Republican senator and presidential hopeful, told reporters in Iowa on Tuesday.

Rubio's comments came on the heels of Trump, the Republican front-runner, announcing that he supports revoking the so-called birthright provision. Another Republican candidate, Wisconsin Gov. Scott Walker, said Monday that the United States should "absolutely" stop granting birthright citizenship.

Rubio said he had not read Trump's immigration plan, "only press accounts." Some of Trump's ideas "have merit, but the majority of it is really not a workable plan that could ever pass Congress," he said.