There was a new urgency to campaigning today by President Obama and his rival Mitt Romney, and not just because the big day is exactly four weeks away.
The latest opinion polls have put Mr Romney in the lead - after his strong performance in last week's TV debate.
So now more than ever, as our Washington Correspondent Robert Moore reports, there is all to play for.
Momentum. It's what Obama had and what Romney took away from him at the first Presidential debate in Colorado.
Unless the Democrats can halt Mitt Romney's remarkable surge then President Obama will be facing the political abyss.
Has President Obama halted the Mitt Romney charge? Has the Republican surge in the polls begun to dissipate?