Some of the campaign promises made by Donald Trump, including a vow to deport millions of undocumented immigrants if elected president, may not see the light of day, U.S. House Speaker Paul Ryan said Sunday.

Ryan spoke on the CBS television program "Face the Nation" about how he's talked with the presumptive Republican presidential nominee over policy differences.

"Look, I've spoken to him about the Muslim ban and how I disagree with it. About the deportation, I don't support that, and he said, 'Well, that's not part of our agenda,'" Ryan said in an interview taped on June 7.