Favorable-to-unfavorable ratio for 2020 candidates in Monmouth poll in Iowa:

Buttigieg 6.2 to 1
Warren 5.4 to 1
Biden 3.8 to 1
Castro 3.6 to 1
Harris 3.6 to 1
Booker 3.5 to 1
Klobuchar 2.9 to 1
O'Rourke 1.8 to 1
Sanders 1.8 to 1

— Ryan Struyk (@ryanstruyk) August 9, 2019