Half of polled American voters believe that members of the Trump campaign colluded with Russia to interfere in the election, according to new data from Quinnipiac University.

A poll published Tuesday revealed that 50 percent of respondents said they believe that people in the Trump campaign coordinated with the Russian government, and 40 percent do not believe it. Numbers from past polls show an increasing number of voters believe there was collusion — in a May 2017 poll, only 43 percent said they believed it.

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The data shows a stark division along party lines, with 10 percent of Republicans and 82 percent of Democrats saying they believe that individuals in the Trump campaign coordinated with Russia to interfere in the election.

According to the data, 59 percent of respondents said they believe the Russian government interfered in the election, regardless of whether they thought it impacted the outcome, while 32 percent said they did not believe it.

Among Republicans, 65 percent said they do not believe the Russian government interfered, while 26 percent said they do. Democrats overwhelmingly believe that Russia interfered, with 85 percent saying so.

This poll was conducted among 1,508 voters between Nov. 29 and Dec. 4 and has a margin of error of 3.1 percentage points. During that time, former national security adviser Michael Flynn pleaded guilty to one charge of lying to the FBI about his contacts with Russia, a key development in the investigation into whether the Trump campaign colluded with Russia to win the election.