FORT LAUDERDALE, Fla. (AP) — A company that has for decades helped people enroll in Medicaid says it won't be able to sign up people for insurance under the new Affordable Care Act because there is too much scrutiny over a so-called navigator program.

According to an email obtained by The Associated Press, Cardon Outreach's chief legal officer Charles Kable told the federal government it was returning more than $800,000 in federal grant money. The funds were supposed to be used to hire people in four states help explain the intricacies of health insurance to millions of people who aren't covered.

While the email didn't go into specifics, some have said those opposed to the health care law, mostly Republicans, are making it difficult for some of the navigator programs to get off the ground.