A Republican senator is joining critics calling for President Trump to release his tax returns.

Sen. James Lankford, R-Okla., told "Fox News Sunday" that he hopes the president releases his returns so people can move on.

"Follow through on what you said you were going to do so the American people can move on," Lankford said.

Trump refused to release his returns during the campaign and since he has taken office. He has said he will release them upon completion of an Internal Revenue Service audit, even though IRS officials have said that the audit doesn't preclude Trump from releasing his returns.