MIAMI - A former Maine man arrested in Florida on charges of threatening President-elect Barack Obama and President George W. Bush is negotiating a possible plea deal.

The lawyer for 23-year-old Raymond Geisel says he's talking with federal prosecutors about a plea based on past mental problems. A federal judge scheduled a hearing Wednesday on the case. Geisel told investigators he was treated for psychiatric issues.

Geisel was arrested in August on charges of threatening to assassinate Obama and Bush. Authorities found he possessed a handgun, knives, machete, ammunition, body armor and other military-style gear.

Geisel, who's originally from Hampden, Maine, moved to South Florida earlier this year. He faces up to five years in federal prison if convicted of threatening Obama.