Battleground polls: Romney's path to the White House now more difficult

One week past the conventions, a flood of polls have been released in crucial battleground states in the race for the White House. And some of them paint a picture that looks more favorable to President Barack Obama than to Republican nominee Mitt Romney.

The polls do have some things in common. They're all of the smaller pool of likely voters and all were conducted after the close of last week's Democratic National Convention in Charlotte, North Carolina.

And several suggest that Romney's electoral path to victory on November 6 is becoming more difficult.

New national numbers in race for White House

The Romney campaign's pollster tells CNN his view of the race has not changed.

"There's nothing in the post-DNC polling that's been released over the last few days to indicate that this is anything but an extremely tight race that Mitt is extremely well-positioned to win," says Neil Newhouse.

New polls released Thursday by NBC News/Wall Street Journal/Marist show Obama with five-point, 49%-44% advantages in Florida and Virginia. The president's margins are within the sampling error.