This Newsweek poll released over the weekend found some surprisingly good news for Democrats. But it probably doesn’t mean much for President Obama and his party: the sample includes too many Democrats, at least based on a lot of other recent polls.

First the good news for Obama.  His approval jumps by six points in the survey (from 48 percent to 54 percent in less than a month).  This would be a significant move for several reasons, but particularly because presidential approval is a key predictor of House seats loss/gain in many statistical models.