This is probably Romney’s best polling day of this election. Not only did he hold leads in the battleground state polls but Romney made relatively large gains compared to pre-DNC surveys. And the North Carolina poll where Obama led was partially conducted prior to the debate and Romney led by 6 points in the post-debate sample. Romney even led a poll in Nevada, the first he’s led since the onset of the general election campaign. The national tracking polls didn’t point toward any additional gains for Romney, but that’s hardly good news for the president, who largely trails in the national polls.