But she said it was rare for an entire media market to be without power, so advertising would continue in those markets with both campaigns hoping for a restoration of service as soon as possible.

Wilner adds that the campaigns may be forced to go heavier on the ground, or do more radio or print ads, in order to reach areas that remain without power well into the week.

4. Will the storm stifle early voting?

The answer is yes, but not in states that are in play. Maryland and the District of Columbia suspended early voting Monday because of Sandy. But the president is expected to easily carry both.

The storm did impact some early voting in some of the eastern portions of the swing state of North Carolina, and could put a damper on some early voting in northern and eastern Ohio. And in the battleground state of Virginia, which allows limited absentee voting in advance of Election Day, some counties Monday canceled such in-person absentee voting.

If the storm does put a dent in early voting, the Obama campaign would feel the bigger impact, as it seems to rely more on pre-election day voting than the Romney campaign.

"Obviously we want unfettered access to the polls because we believe that the more people come out, the better we're going to do, and so to the extent that it makes it harder, you know, that's a source of concern," Obama campaign senior adviser David Axelrod said on "State of the Union."

5. Pulling the plug on polling

With just a week to go until Election Day, expect a flood of final polling. Or maybe not.

The storm is washing out some polling organizations' plans. Both Gallup and Investors Business Daily/TIPP announced Monday that they were temporarily suspending their daily national tracking polls. And in some of the states directly impacted by the storm, polling may become much more difficult, as Sandy knocks out phone lines and some cell service.