President Obama’s aura of wonderfulness sure isn’t what it used to be. It is noteworthy that his appearance at the Democratic National Convention was dramatically overshadowed by Bill Clinton.

The Gallup poll shows signs of Obama’s lackluster performance at the DNC:

Forty-three percent of Americans rated Obama’s nomination acceptance speech as “excellent” or “good,” marginally better than the 38% who gave the same ratings to Mitt Romney’s speech in Gallup’s Aug. 31-Sept. 1 post-Republican Convention poll. It is also a much less favorable reaction than Americans gave to Obama’s 2008 acceptance speech, when 58% rated his speech positively.

Obama’s 2012 acceptance speech ranks on the lower end of nomination speeches according to Americans’ post-convention evaluations, while his 2008 speech is the most positively rated in Gallup’s records.

Bill Clinton gets the last laugh on the convention. (“Gallup found 56% of Americans rating Clinton’s speech positively, including 34% who said it was ‘excellent,’ similar to the high ratings of Obama’s well-regarded 2008 speech. Independents and Republicans were much more positive about Clinton’s speech than Obama’s, while Democrats were highly positive about both.”) Moreover, Gallup polled all adults, not even registered voters, raising the question as to whether actual voters viewed Obama even more negatively.

Meanwhile, the Hill’s poll of likely voters reports that a large plurality of voters (41 percent) say their opinion of Obama has gotten “much worse” since he took office, while only 24 percent say their opinion is not “much better.” For Mitt Romney, 47 percent say their opinion has improved either a lot or slightly as they have gotten to know him, while 39 percent say it has gotten worse.

At a time when the blogosphere is wildly overestimating the mild bump in daily tracking polls, it is helpful to remember that whatever nudge Obama might have gotten could very well be the Clinton bump, not his own. Unfortunately for Obama, his name will appear on the November ballot.

The takeaway for Romney is the more they see of the GOP nominee the better, and voters’ continued exposure to Obama is not necessarily a plus for the incumbent president.