Independent Sen. Bernie Sanders Vermont remains the most popular senator in the country, according to a new poll from Morning Consult. The former Democratic presidential candidate earned 63% of support from Vermont voters.

Meanwhile, Senate Majority Leader Mitch McConnell is the most unpopular senator in the country. The senior Kentucky senator earned only 30% approval from voters in the Bluegrass State.

The Morning Consult rankings are based on a survey of more than 330,000 registered voters between April 1 and June 30.

The five least and five most popular senators are:

LEAST POPULAR: 1. Kentucky Republican Mitch McConnell

Foto: Mitch McConnell.sourceReuters/Eric Thayer

Approve: 30%

Disapprove: 56%

2. Arizona Republican Jeff Flake

Foto: Jeff Flake.sourceDrew Angerer/Getty Images

Approve: 30%

Disapprove: 51%

3. Arizona Republican John McCain

Foto: John McCain was diagnosed with brain cancer last year.sourceAssociated Press/J. Scott Applewhite

Approve: 42%

Disapprove: 46%

4. Missouri Democrat Claire McCaskill

Foto: Claire McCaskill.sourceAssociated Press/Jacquelyn Martin

Approve: 40%

Disapprove: 44%

5. North Dakota Democrat Heidi Heitkamp

Foto: Heidi Heitkamp.sourceAssociated Press/Manuel Balce Ceneta

Approve: 44%

Disapprove: 44%

MOST POPULAR: 1. Vermont Independent Bernie Sanders

Foto: Bernie Sanders.sourceMark Wilson/Getty Images

Approve: 63%

Disapprove: 32%

2. South Dakota Republican John Thune

Foto: John Thune.sourceMark Wilson/Getty Images

Approve: 62%

Disapprove: 25%

3. Minnesota Democrat Amy Klobuchar

Foto: Amy Klobuchar.sourceChip Somodevilla/Getty Images

Approve: 60%

Disapprove: 24%

4. South Dakota Republican Mike Rounds

Foto: Mike Rounds.sourceMichael Conroy/AP Images

Approve: 58%

Disapprove: 26%

5. Rhode Island Democrat Jack Reed

Foto: Jack Reed.sourceChip Somodevilla/Getty Images

Approve: 57%

Disapprove: 23%