The pandemic versus the economy defines the presidential contest in two key battlegrounds, with Florida holding firm to its toss-up status while Joe Biden leads slightly in Pennsylvania in the season's final ABC News/Washington Post polls. There's little change in either state. In Florida, Donald Trump has 50% support among likely voters to Biden's 48%; it was 51%-47% in an ABC/Post poll Sept. 20. Trump won the state by 112,911 votes out of more than 9.4 million cast in 2016. In Pennsylvania, the race stands at 51%-44%, Biden-Trump, a 7-point advantage for the Democrat; that compares with a 9-point margin...