Barack Obama could be on the verge of falling out of contention in Florida. Despite spending an estimated $8-million on campaign ads in America's biggest battleground state and putting in place the largest Democratic campaign organization ever in Florida, Obama has lost ground over the summer. Florida has moved from a toss-up state to one that clearly leans toward John McCain, fueling speculation about how much longer the Democratic nominee will continue investing so heavily in the state.

Obama can still win Florida despite the polling gains McCain has made since naming Sarah Palin his running mate, and there is no sign Obama is pulling back in Florida yet. Far from it. Obama allies say he has about 350 paid staffers in the state and about 50 field offices, including in places not known as fertile ground for Democrats, such as Sun City Center, Lake City and Sebring.

But for all the attention to Florida from the Obama campaign, there's little tangible evidence it's paying off. More here.