new Quinnipiac national poll on 2020 general election shows every prospective Democratic nominee beating Trump :

Biden 51%, Trump 42%
Sanders 51%, Trump 43%
Warren 50%, Trump 43%
Bloomberg 48%, Trump 42%
Buttigieg 48%, Trump 43%
Klobuchar 47%, Trump 43%

— John Harwood (@JohnJHarwood) December 10, 2019