Leading members of Congress are calling on President Barack Obama to fire one of his top advisers amid a deepening scandal over accusations the White House intentionally misled lawmakers and the American public about the contents of last summer’s comprehensive nuclear agreement with Iran, according to a letter sent Monday to Obama and obtained by the Washington Free Beacon.

The lawmakers are pressing Obama to fire deputy national security adviser Ben Rhodes following revelations he and other officials “spearheaded the charge to mislead elected lawmakers and the American people about the Iran nuclear deal and the negotiations that led to this agreement,” according to the letter.

Rhodes will skip a Tuesday hearing before the House Oversight Committee as it investigates claims he and other senior White House officials waged a misinformation campaign to garner approval for the contested Iran deal, according to sources who spoke to the Free Beacon.