Intense Political Week Brings Decline in Swing Voters

"The percentage of voters who are 'up for grabs' has declined sharply in the past week, from 30% to 21%, according to the latest USA Today/Gallup poll. The decline in the proportion of voters classified as swing voters is coincident with two major political events that took place over the past seven days -- the Democratic National Convention and John McCain's announcement of Sarah Palin as his vice-presidential running mate." Intense Political Week Brings Decline in Swing Voters -- Gallup

There is also a short video from Gallup on the topic if you're interested. In this video they note that there still is 21% undecided, which means pretty much anything could happen in this close race.