Yesterday’s USA Today/Gallup poll found President Obama’s attacks on Mitt Romney’s Bain Capital career have had little impact on the race. Today’s Reuters/Ipsos poll supposedly contradicts that finding, but don’t put much stock in that just yet:

Sustained attacks by President Barack Obama’s campaign on Republican rival Mitt Romney’s business history and refusal to release more tax records appear to be working, a Reuters/Ipsos poll showed on Tuesday.

More than a third of voters who are registered to a party or as an independent said in the online survey that what they had heard about Romney’s taxes and his time at Bain Capital private equity firm had given them a less favorable impression of the Republican candidate.

And particularly worrying for Romney is that a large slice of independent voters — whom he needs to win the November 6 election — are also buying into the Obama campaign’s portrayal of him as a ruthless businessman who may be hiding something in his taxes.

According to the poll, 36 percent of registered voters said the attacks have given them a less favorable impression of Romney, but Democrats likely make up an overwhelming portion of that statistic.

As for independents, 26 percent viewed Romney less favorably and 13 percent more favorably after hearing attacks on his Bain record. In other words, 74 percent of independents either view Romney more favorably after the attacks, or simply don’t care. That’s the problem for Obama. If independent voters just yawn at his Bain attacks and move on, that’s almost as bad as if the attacks backfire altogether. He’s still sinking tons of money into messaging that isn’t helping him.

Also note that the Reuters/Ipsos poll has a “credibility interval” of plus or minus 8.7 percentage points for independents. That’s a massive margin of error, which makes it difficult to take away anything serious from its findings on independents.