The first statewide poll of Arizonans on Republicans' replacement for Obamacare shows more than half disapprove of the plan.

Fifty-five percent of those surveyed had an unfavorable opinion, 39 percent had a favorable opinion and 6 percent were undecided, according to the Public Policy Polling survey.

Sixty percent said Congress should fix what doesn't work in the Affordable Care Act, while 37 percent said Congress should start over.

READ: Arizona poll results on GOP's Obamacare replacement

The survey was done Friday through Sunday, before Monday's release of the Congressional Budget Office's score of the plan.

The GOP plan has faced mounting criticism from both Democrats and Republicans since the CBO report.

The non-partisan agency said 24 million Americans would lose their health insurance over the next decade, but the budget deficit would decline by $337 billion.

The survey also contains a warning to Republican Arizona Sen. Jeff Flake, who is up for re-election next year.

Fifty-seven percent of respondents said they would be unlikely to vote for a member of Congress who supported the Republican replacement plan, 32 percent said they would be more likely, and 10 percent said it would make no difference.

Flake's support in the poll was under water. Just 35 percent said they would vote for him if the election were held today; 47 percent said they would vote for a Democratic candidate.

The poll was released by Save My Care, which opposes the Republican plan.

Public Policy Polling surveyed 861 Arizona voters, with a breakdown of 40 percent Republican, 36 percent Democratic and about 25 percent independent.

The Democratic sample is larger than the party turnout that would be expected for a midterm election.

But respondents' presidential preference roughly matched the Arizona results of the 2016 election: 49 percent said they voted for Donald Trump, 46 percent sided with Hillary Clinton.

The poll's margin of error is 3.3 percentage points.