Here are the country's most and least popular senators
LEAST POPULAR: 1. Kentucky Republican Mitch McConnell
2. Arizona Republican Jeff Flake
Approve: 32%
Disapprove: 49%
3. Missouri Democrat Claire McCaskill
Approve: 37%
Disapprove: 48%
4. New Jersey Democrat Robert Menendez
Approve: 31%
Disapprove: 46%
5. Nevada Republican Dean Heller
Approve: 37%
Disapprove: 44%
MOST POPULAR: 1. Vermont independent Bernie Sanders
Approve: 63%
Disapprove: 30%
2. Vermont Democrat Patrick Leahy
Approve: 61%
Disapprove: 27%
3. Minnesota Democrat Amy Klobuchar
Approve: 58%
Disapprove: 26%
4. Maine independent Angus King
Approve: 58%
Disapprove: 29%
5. South Dakota Republican John Thune
Approve: 58%
Disapprove: 30%