Romney didn't get a bounce at all. His post convention anti-bounce looked like a water balloon bursting on cement at impact. It was either +1, 0 or -1, depending on which media you look at.
President Barack Obama and the Democratic Party look as if they are getting at least a preliminary bounce from their convention. Today's (Friday, Sept. 7) Gallup Daily tracking update puts Obama's job approval rating at 52%, the highest it has been since May 2011, after the killing of Osama bin Laden. Obama has also moved to a 48% to 45% lead over Mitt Romney among registered voters in the election tracking, up from Obama's 47% to 46% margin over the last nine days. Gallup averages the job approval rating on a three-day rolling average, meaning that today's report encompasses interviewing conducted over the three days of the Democratic Convention in Charlotte -- Tuesday, Wednesday, and Thursday. Gallup's report of presidential election preferences are, on the other hand, based on a seven-day rolling average stretching from last Friday, the day after the GOP Convention ended, through last night. Gallup*Interestingly, if you visit the Gallup home page, you'll find this link way at the bottom. I dare you to find it without doing a search on a key word.