NBC/WSJ poll: Obama leads in Florida, Virginia, Ohio

The latest NBC/WSJ/Marist swing state surveys of Ohio, Florida and Virginia do not hold good news for Mitt Romney folowing the two weeks of party conventions.

President Obama leads Ohio, a crucial battleground, by seven points, according to the surveys. He leads by five points in the other two. And the undecideds are few.

The polls were taken from Sept. 9 through Sept. 11, during a window when national surveys have indicated a convention bump for the president. Romney's campaign has warned the media against reading too much into the post-campaign "sugar high."

The Florida and Virginia numbers aren't such a wide divide.

But the numbers in Ohio roughly match up with internal surveys conducted by both Democrats and Republicans recently, and it is a state where Romney's campaign knows it has a battle. The auto bailout and the ads from the pro-Obama super PAC slamming Romney's business record have had an impact, and the Republican needs a couple of things to happen, including a mistake by the president either in office, or at the debates next month.

Maggie Haberman is senior political reporter for Politico.