According to Gallup:
Obama Gains Among Former Clinton Supporters
by Frank Newport
PRINCETON, NJ -- The Democratic convention appears to have helped solidify support for Barack Obama among former Hillary Clinton supporters, with the percent saying they will vote for Obama in November moving from 70% pre-convention to 81% after the convention, and the percent certain to vote for Obama jumping from 47% to 65%.
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NOTE: All data, information and highlighted commentary is to be credited to Gallup Poll found here: http://www.gallup.com/...
Pre- and Post-Convention Surveys
The analysis reported here compares interviews conducted Aug. 21-23, prior to the beginning of the Democratic National Convention, to interviews conducted Aug. 30-31, days after the conclusion of the convention. [emphasis mine]
Which would also include the Palin factor.
Tracking Hillary Clinton Voters
The Democratic convention appears to have increased certainty of support for Obama among Democratic voters, including in particular among the critical group of Democrats who earlier this year supported Hillary Clinton in the Democratic primaries (see graph above).
Much attention was given to the fact that only 47% of former Clinton supporters said they were certain to vote for Obama in the pre-convention USA Today/Gallup poll, and that 16% of these voters said they were going to vote for McCain, with another 14% undecided.
The new polling shows that many of these disaffected Clinton voters have now returned to the loyal Democratic fold. The percentage of former Clinton voters who say they are certain to vote for Obama has now jumped to 65%. Although 12% of former Clinton voters persist in saying that they are going to vote for McCain, that's down from 16%, and the percentage who are undecided has dropped in half.
Overall, support for Obama among this group has moved from 70% pre-convention to 81% post-convention.
McCain and Bush, Obama's Experience
The percent of Americans who profess to be "very" concerned that John McCain would pursue policies too similar to those of President Bush moved up slightly between the two surveys, from 41% to 47%. At the same time, the percent "somewhat" concerned dropped slightly, such that the total percent of Americans concerned about this McCain to Bush connection stayed fairly stable.
There was also a slight shift in Obama's favor in perceptions of his experience. There has been a 7-point drop in the percentage of Americans who say they are very or somewhat concerned that Obama lacks the experience necessary to be president since the Democratic convention.