The Obama campaign has been hammering Romney on Bain Capital, as well as his commitment to not releasing his tax records.

And it is working.

Three national polls in the past two days show a significant Obama lead.  I already mentioned one: the Reuters/Ipsos poll showing Obama up by 7 points.  The next day, CNN had another poll also showing Obama up by 7 points.

And then Fox News released its poll showing Obama up by nine points.  And that's Fox News.

Here's the latest punch from Obama, released today:

Here's the Pollster graph (an amalgamation of all polls), showing the recent uptick: