[img]http://d.yimg.com/a/p/afp/20100225/capt.photo_1267114225679-1-0.jpg?x=130&y=80&q=85&sig=uIUVS2eHCnW__U5j3rD8lw--[/img]AP - Giving no ground, President Barack Obama and Republican leaders fought forcefully for their competing visions of historic health care reform Thursday in an exhausting, often-testy live-on-TV debate. Far from any accord, Obama signaled the Democrats were prepared to push ahead for an all-or-nothing congressional vote.