Gallup: No bounce for Romney post-GOP convention

Mitt Romney acknowledges delegates before speaking at the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012.
AP Photo/Charles Dharapak

Updated 10:45 p.m. ET

(CBS News) Despite a week of high-profile speeches and events designed to introduce Americans to the Republican presidential nominee, a new tracking poll from Gallup suggests that Mitt Romney received no bump in the polls as a result of the Republican National Convention.

The survey, which polled voters between August 31 and September 3, showed Romney with 46 percent support, while President Obama earned 47 percent support.

In Gallup's pre-convention tracking poll, conducted from August 24-27, Mr. Obama was at 46 percent support and Romney was at 47 percent. Both results are within the poll's margin of error, which is +/- three percent.

According to the survey, the lack of a bounce is "consistent with Gallup's immediate post-GOP convention reaction poll, showing Americans giving Romney's acceptance speech, and the convention more generally, rather muted ratings."

Moreover, Gallup's seven-day average of presidential preferences shows that Mr. Obama has held steady at 47 percent to Romney's 46 percent every day since August 29.

"That is a slight shift in Obama's favor, as Romney held a consistent two-percentage-point advantage for nine days in mid-August, shortly after announcing Paul Ryan as his vice presidential running mate," writes Gallup's Jeffrey Jones. "That was the longest period in Gallup Daily tracking showing Romney with any kind of edge."

The survey notes that Romney joins 1972 Democratic nominee George McGovern and 2004 Democratic nominee John Kerry as the only recent presidential nominees who did not benefit from a post-convention bump. But according to Gallup, it's possible that the bounce was depressed by the fact that voters already had a "good sense" of who Romney is, thanks to the extended primary process.

Another poll out Tuesday night showed Romney's favorability rating rising slightly post-convention. 

A Washington Post-ABC News poll has Romney gaining five points among all adults vs. a week ago.

Meantime, Mr. Obama's favorability is down, as just 47 percent of registered voters view him favorably and 49 percent rate him unfavorably.