Kansas Secretary of State Kris Kobach on Wednesday defended President Trump’s decision to end a key Obama-era immigration program, saying that families of immigrants brought to the U.S. illegally as children should be deported.

“They came in presumably with a parent or parents, and so the correct policy is for us to enforce federal law and deport the whole family to the home country,” Kobach said during an appearance on CNN.

Kobach, who serves as co-chairman of Trump’s voter fraud commission and has been a fierce critic of illegal immigration, blasted the Deferred Action for Childhood Arrivals (DACA) program that Trump said Tuesday he would end.

The Kansas secretary of state called DACA a “slap in the face” to immigrants waiting to enter the country legally, saying he doesn’t consider it wrong to ask DACA recipients to go back to their birth country and apply to re-enter the U.S.