With polls showing his lead decreasing in swing states, Barack Obama's biggest fear is complacency. Today, in Jacksonville, Florida, he urged supporters to "work like our futures depend on it for the next 24 hours because it does" Meantime, John McCain is summoning all his energy to accomplish an upset, urging supporters to "get your neighbors to the polls. I need your vote." Andrew Kohut is president of the independent Pew Research Center on public opinion.