Story highlights 39% of voters say they are less likely to vote for Clinton as a result of her exclusive use of a private email account

But Clinton still tops Republican front-runner Donald Trump in a hypothetical general election matchup

Washington (CNN) A new CNN/WMUR Poll of New Hampshire voters finds the state is poised to remain blue if Donald Trump winds up the Republican Party's nominee for the presidency, but questions about Hillary Clinton's use of personal email while secretary of state raise doubts about her candidacy for a growing number of New Hampshire voters.

According to the poll, 39% of voters, including 21% of Democrats and 43% of independents, say they are less likely to vote for Clinton as a result of her exclusive use of a private email account to conduct business while secretary of state. Nearly six in 10 Republicans agree.

Back in April, 34% of voters said they were less likely to back Clinton because of her email use. Among independents, the share saying her email use makes them less likely to back her has climbed 14 points, among Democrats, it's up 8 points.

But Clinton still tops Republican front-runner Trump when the two are tested in a hypothetical general election matchup among those likely to cast a ballot in next year's presidential contest, with Clinton at 50% to Trump's 42%.

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