The president now has a 5-point advantage over Romney in the Gallup daily tracking poll, 49%-44%.
Scott Rasmussen's daily tracking poll has Obama up 49%-45%, his biggest lead over Romney in that survey since March 17.
And for the second day in a row, Obama enjoys a 4-point lead over Romney in the Reuters/Ipsos tracking poll.
All of these leads have been built in the days since the Democratic convention in Charlotte.
"Obama's convention bounce is evident both in the head-to-head numbers with Romney and in his job approval ratings," Rasmussen reported.
Note that Rasmussen is a frequent commentator on Fox News, and some analysts believe his polls lean Republican (which Rasmussen disputes).
It also should be noted that tracking polls in the days ahead will take Friday's poor jobs report into account -- and that convention bounces in previous elections have eventually evaporated.
Rasmussen writes:
"The president's bounce began the night after Bill Clinton spoke to the convention and received rave reviews.
Sixty-six percent (66%) of voters nationwide have a favorable opinion of the former president. Democrats overwhelmingly believe Clinton and Obama have similar views on how to fix the economy, but few Republicans and unaffiliated voters share that assessment.
Among all voters, 59% see Clinton as a better president, while 19% prefer Obama. Democrats are evenly divided."
(Copyright © 2012 USA TODAY)