Surprisingly the poll did not include a matchup between Republican Florida Senator Marco Rubio and Clinton. Rubio consistently polls as one of the best general election candidates.
The Fox News poll also confirmed other polling that indicated Biden is a much stronger general election candidate than Clinton. Matchups with major Republican candidates show Biden ahead by the following margins: Trump 13%, Bush 5%, Rubio 1%, Fiorina 4%, and Carson 4%.
If you're playing at home, with Biden instead of Clinton as the nominee, that is a swing in the Democrats favor of 18% against Trump, 9% as to Bush, 8% with Fiorina, and 15% in a matchup against Carson.