Senate Environment and Public Works Committee Chairman John Barrasso rejected a request from Democrats on Tuesday to hold a hearing on Environmental Protection Agency Administrator Scott Pruitt’s use of round-the-clock security and his heavy spending on his own protection.

Pruitt is the first EPA administrator to have a 24/7 security detail, prompted by multiple death threats he says he has received. The Associated Press last week reported the EPA has spent about $3 million on his security, including travel and overtime pay for Pruitt’s detail.