ALBUQUERQUE, N.M. — New Mexico’s two U.S. senators have joined fellow Democrats and environmentalists in calling for the embattled chief of the Environmental Protection Agency to resign.

Sens. Tom Udall and Martin Heinrich issued statements Thursday, taking aim at Scott Pruitt’s policy decisions and recent suggestions that he may have abused his power.

A review of Pruitt’s ethical conduct by White House officials is underway. Other probes are being conducted by congressional oversight committees and EPA’s inspector general regarding spending on luxury air travel and unusual security precautions.

Heinrich suggested that Pruitt has been plagued by conflicts of interest and that the agency needs a leader who bases decisions on the best available science.

Udall said he would introduce a resolution calling on Pruitt to resign.