Democratic presidential candidate Barack Obama has seen his lead in Massachusetts and across the nation slip precipitously over the past few months, especially with older, more experienced, voters. In June, Obama was ahead of Republican candidate John McCain by 23 percentage points, but this summer, Obama has been virtually bleeding support in the Bay State. He now leads McCain by only 9 percentage points here. Nationally, Obama's lead varies on an almost daily basis. In recent days, he has been tied with McCain, ahead by 3 points and ahead by 1 point. The fluctuating numbers come on the heels of...