Without CBS/NYT/Quinnipiac, today was all but assured to be a better polling day for Romney. That said, the polls still suggest that Obama leads nationally, as well as in states worth 348 electoral votes. Let's talk about Nevada. In most of the electoral maps produced here over the last four months, Nevada was presumed to be one of the very first battleground states to enter Obama's column.
Three NYT/CBS/Quinnipiac polls grabbed the headlines by showing Obama with double-digit leads in Ohio, Pennsylvania, and Florida. Importantly, Obama hit 53 percent in all three states, giving him more than enough of the vote to withstand substantial losses among undecided voters. Obama’s lead in the battleground states is getting large enough that the margin might not accurately represent his advantage. The remaining undecided voters are probably latent Romney supporters—voters who tend to vote for Republican candidates, disapprove of the president’s performance, but dislike Romney.
Some allege that the polls oversample Democrats, since they show Democrats outnumbering Republicans by the same margin that they did in 2008, or even more. It does seem hard to imagine that Democrats are regenerating the same support that they received in the midst of a perfect storm, but a closer look reveals that the polls don't show as many Democrats as 2008. Consider the “media” polls that have received scrutiny over the last few weeks.