The Trump administration is investigating Medicaid spending in at least six Democratic-led states that provide comprehensive health coverage to poor and disabled immigrants living in the U.S. without permanent legal status. Public records obtained by KFF Health News and The Associated Press show the Centers for Medicare and Medicaid Services is looking for waste, fraud or abuse. The federal letters to state health agencies in California, Colorado, Illinois, Minnesota, Oregon and Washington say CMS is reviewing federal and state payments for services like prescription drugs and specialty care. California is the biggest target after the state self-reported overcharging the government more than $500 million, spurring the threat of a lawsuit.