(CNN) The number of voters who said that the President is a factor in their vote for Congress this year is the highest it's been for any midterm election since Pew began tracking the question in 1982 during Ronald Reagan's first term.

Six in 10 registered voters said President Donald Trump is a factor in a Pew Research Center poll taken in September, including 37% who said they'll cast a ballot to oppose the President and 23% who'll be voting to support him. Just 37% said Trump isn't a factor in their vote for Congress.

The number of people who are using their vote to oppose Trump is higher than most previous elections where the question was asked, only behind President George W. Bush in early October 2006, when 39% of registered voters said they would use their vote against him, 18% wanted their vote to support the President and 40% didn't factor him in.

Trump is just about as disliked by Democrats as Bush was in 2006. Two-thirds of Democratic voters said their vote is against Trump and 68% said the same about Bush in 2006, during the extremely unpopular Iraq war. During the 2006 midterm election, Democrats won six seats in the Senate and 31 in the House, taking control of both chambers.

But Republicans are slightly more passionate about Trump than they were about Bush. Less than half said their vote for Congress will be in support of the President in August, eight points more than the amount who said the same of Bush.

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