But Obama’s lead over Romney among registered voters was 49 percent to 42 percent, up slightly from the 6-point advantage the president held a month earlier over the former Massachusetts governor.

The results of the monthly poll – in which a majority of voters agreed that the economy is the most important problem facing the United States – suggest that the Obama campaign’s efforts to paint Romney as being out of touch with the concerns of middle-class Americans could be preventing the Republican from gaining momentum in the race…

The poll indicated that 46 percent of registered voters thought Obama was stronger on jobs and the economy, compared with 44 percent for Romney. And on tax matters, 49 percent saw Obama as stronger, compared with 38 percent for Romney.

In an advertising blitz that has been focused on a dozen politically divided states, Obama and his Democratic allies have been hammering Romney’s record as a private equity executive at Bain Capital, accusing him of plundering companies and shipping jobs overseas.