Biden is sitting on more campaign cash than Trump and is putting it to use, blanketing airwaves with a nearly 2-to-1 advantage over the final two weeks. The incessant campaign ads feature both upbeat messages and blistering criticism of Trump's handling of the pandemic.
It's part of what Josh Schwerin, the senior strategist for Democratic super PAC Priorities USA, says has helped Biden gain an advantage.
"Those dual messages - continuing to draw a contrast with Trump, but also offering that positive aspirational message, giving people a reason to vote for Biden and not just against Trump - continues to be the best way forward. And we're seeing it work," he said.
Democrats have been heartened by their lead in the record numbers of early votes that have been cast across a number of battleground states - though they caution that Republicans are more likely to turn out on Election Day and certain to make up ground.
worst public health crisis in a century - with risks for each candidate.