With a month to go before the general election, Gov. Charlie Baker, a Republican, remains the most popular governor in the U.S., according to a poll released Wednesday by Morning Consult.

The national organization publishes quarterly rankings of popularity for all senators and governors. The latest survey was based on 360,000 interviews done between July 1 and Sept. 25.

The poll found that 70 percent of voters approve of the job Baker is doing and 17 percent disapprove. Baker is followed in popularity by Maryland Gov. Larry Hogan, who, like Baker, is a Republican governor of a Democratic-leaning state.

The least popular governors are Mary Fallin, a Republican from Oklahoma and Dan Malloy, a Connecticut Democrat.

Baker and Hogan have frequently led the national rankings throughout their terms in office.

Baker is facing Democrat Jay Gonzalez in the Nov. 6 election.

On the Senate side, Vermont independent Bernie Sanders, who ran for president as a Democrat in 2016, is the most popular senator (63 percent approval to 30 percent disapproval). Senate Majority Leader Mitch McConnell, a Republican from Kentucky, is the least popular (33 percent approval to 52 percent disapproval).

In Massachusetts, 50 percent of voters approve of the job Sen. Elizabeth Warren is doing and 40 percent disapprove. For Sen. Ed Markey, 49 percent approve and 25 percent disapprove. Both are Democrats.