The poll, which was conducted after the terror attacks on Paris, from 23-30 November, showed Carson tied in third place with Texas senator Ted Cruz, both attracting 16% of Republican voters. A poll by the same company last month had Carson in second place on 23%.
Donald Trump, meanwhile, solidified his frontrunner status with 27% of voters, while Florida senator Marco Rubio attracted 17%. However, Trump remains the more divisive candidate: when respondents were asked if there were any candidates they definitely would not vote for, 26% of respondents selected Trump but only 5% ruled out Rubio.
Hillary Clinton also widened her lead in the Democrat race by a further 12 percentage points. A total of 60% of respondents who identified as Democrat or Democratic leaning said that if the primary were to be held today, they would vote for Clinton, while 30% said the same about Vermont senator Bernie Sanders. Last month in a poll by the same university, Clinton had 53% of support and Sanders was at 35%.
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