A U.S. Senator from Texas is calling for the IRS commissioner to resign.

U.S. Senator John Cornyn called for the resignation of Internal Revenue Service Acting Commissioner Steven Miller, due to the agency’s targeting of conservative groups in Texas.

The IRS is under fire from some U.S. politicians and watchdog groups after news broke of agents targeting tea party groups and other conservative organizations when they applied for tax exempt status.

The person in charge of the IRS unit that oversees tax-exempt groups apologized last week, saying that the practice of additional reviews for groups with the words “tea party” or “patriot” in their applications was carried out by low-level workers.

U.S. Attorney General Eric Holder has announced that he has launched a criminal probe into the actions of the agency during that time.

Cornyn said “When the IRS starts behaving like a rogue agent that considers itself above the law, we’ve entered truly dangerous territory.”

Video of Cornyn’s complete comments on the situation is available below as well.