The latest Fox News poll shows:
Biden performs best against Trump (51-39 percent) in hypothetical head-to-head matchups. He leads by 12 points, garners over 50 percent and keeps Trump below 40 percent.
In early October, Biden led by 10 (50-40 percent).
More Democrats (91 percent) back Biden than Republicans (86 percent) support Trump, and 88 percent of 2016 Trump voters would stick with him, while 91 percent of Clinton voters would support Biden.