WASHINGTON (AP) ? President Barack Obama is reaching out to military veterans and seniors, two core constituencies in Florida, as he tries to keep the pressure on rival Mitt Romney.

Obama opens two days of campaigning in Florida with stops Thursday in Jacksonville and West Palm Beach.

The Florida trip comes as Obamas re-election campaign and Democrats press Romney to release more tax returns and try to raise questions about his time as the head of a private equity firm.

Florida is the largest and most coveted of the nations toss-up states, a place where Romney could severely damage Obamas chances of winning re-election.

Yet if Obama can lock down Floridas 29 electoral votes, it would be difficult for Romney to mount enough support elsewhere to capture the White House.

By Terra/AP