Sen. Ted Cruz’s (R-TX) wife Heidi Cruz, while campaigning in Greenfield, Indiana just days before the Hoosier state’s primary, said her husband “is an immigrant.”

“Ted is an immigrant,” Cruz said, reportedly stressing the word “is.”

We have been unifying this party. Five of those 17 candidates have endorsed our campaign. And different parts of the party. We’ve been unifying fiscal conservatives. Evangelicals. Young people. Do you know that Ted has been winning the millennial vote in state after state? He’s been winning the women’s vote in state after state. Ted is an immigrant. He is Hispanic. He can unify this party. We have libertarians joining our cause. I have people everyday from the Democrat party telling me that they have re-registered to vote for Ted as a Republican because they understand what he stands for and he represents American values.

The Washington Examiner’s Byron York reports, “Asked later, a Cruz aide said Mrs. Cruz misspoke.”

“As she has in numerous speeches over and over, Heidi was referring to Ted as being the son of an immigrant,” Cruz’s campaign spokeswoman Catherine Frazier explained. “That is a story she shares repeatedly on the campaign trail. It is an integral part of his background and personal story, one which resonates with the millions of Americans who share a similar background, and that gives hope to those struggling to climb the economic ladder.”

GOP frontrunner Donald Trump has long questioned whether or not Cruz is a natural born citizen and eligible to run for president. Cruz was born in Canada, but his mother was a U.S. citizen. Cruz’s father is Cuban.