A majority of voters listed healthcare as their most important issue in a poll seeking to preview the 2018 congressional midterm elections.

The poll was conducted by Hart Research on behalf of the pro-Obamacare group Protect Our Care, which argues Republicans will face a major backlash for attempts to repeal Obamacare. The poll found that 54 percent of respondents listed healthcare as one of two issues most important to them in deciding on how to vote this fall in congressional midterms.

The economy came in second with 29 percent, 28 percent for taxes, and 18 percent for immigration.

“These results highlight the durability of healthcare as a powerful concern for voters, even when healthcare legislation is not front and center in the news,” Hart said.

Protect Our Care argues that Republican attempts to repeal Obamacare will backfire on them during the 2018 midterms. All of the Republican repeal and replace plans polled poorly before their eventual defeat.

The Senate failed to advance a “skinny” repeal bill in late July.

However, Republicans did score a healthcare victory by repealing Obamacare’s individual mandate in their tax legislation last month. The mandate, which calls for everyone to have health insurance or pay a penalty, will be repealed in 2019.

The poll was based on responses from 1,000 interviews conducted Jan. 3-7. Hart does not provide a margin of error.