GOP presidential candidate former Pennsylvania Sen. Rick Santorum says that fellow GOP candidate Sen. Ted Cruz (R-TX) is “misinforming the public” about him being a “natural born” citizen and eligible to run for President of the United States.

The Des Moines Register’s politics reporter Jennifer Jacobs posted on Twitter:

Jacobs added:

Santorum held a campaign event during lunchtime in Des Moines, Iowa on Wednesday.

Santorum’s comments about the debate over whether or not Cruz is a “natural born” citizen come after GOP frontrunner Donald Trump said it could be a “very precarious” issue if Cruz were to become the GOP nominee during an interview with the Washington Post last week.

Cruz was born in Canada, but his mother was a U.S. citizen.