35% of Democrats think Bush knew about 9/11 beforehand

14% of Republicans said that the President knew - 35% Democrats said he knew

https://en.wikipedia.org/wiki/Opinion_polls_about_9/11_conspiracy_theories#United_States

scroll down to 'Other United States Polls' to find the following paragraph -

Rasmussen Reports published the results of their poll May 4, 2007.
According to their press release, "Overall, 22% of all voters believe
the President knew about the attacks in advance. A slightly larger
number, 29%, believe the CIA knew about the attacks in advance. White
Americans are less likely than others to believe that either the
President or the CIA knew about the attacks in advance. Young
Americans are more likely than their elders to believe the President
or the CIA knew about the attacks in advance.", "Thirty-five percent
(35%) of Democrats believe he did know, 39% say he did not know, and
26% are not sure." and "Republicans reject that view and, by a 7-to-1
margin, say the President did not know in advance about the attacks.
Among those not affiliated with either major party, 18% believe the
President knew and 57% take the opposite view."[18]