About 8 percent of Americans have seen Michael Moore's anti-Bush blockbuster, "Fahrenheit 9/11" (search) — but it hasn't changed many minds, because almost all of them couldn't stand President Bush (search) in the first place, a new poll reports.

A majority of those who went to see the Bush-bashing flick — 55 percent — are Democrats, according to the national survey by the University of Pennsylvania's Annenberg Center (search).

Another 24 percent describe themselves as "independents" — but they are much more liberal than independents generally and three times as likely to have voted for Al Gore (search) over Bush in 2000, according to the July 5-25 survey of 5,051 adults.

Only 10 percent of those who have seen "Fahrenheit 9/11" are Republicans — and the survey's director, Kathleen Hall Jamieson, suggested it may have strengthened their support for Bush.

The movie is partisan, but "such communication attracts people who know they will disagree but want to see what the other side is saying. It tends to reinforce their partisanship," Hall said.

Overall, the survey found Americans are split, 49-49 percent, on whether they approve of how President Bush is handling his job — but 86 percent of those who saw "Fahrenheit 9/11" disapprove.

The survey contrasted those who saw "Fahrenheit 9/11" with the kind of pro-Bush Americans who listen to Rush Limbaugh. Among Limbaugh's Dittoheads, 88 percent approve of how the president is doing his job.

The country is also split, 49-48 percent, on Bush's handling of the war on terror — but 87 percent of "Fahrenheit 9/11" views disapprove, while 83 percent of Limbaugh listeners approve.

The two groups are roughly equal in size — 8 percent of Americans have seen the Moore film and 7 percent listen to Limbaugh — but the survey noted that Limbaugh may have more impact since he's on the air five days a week, three hours a day, while most will see the movie only once.

Moore has described his controversial flick — which paints an ugly, cartoonish picture of Bush — as a "de facto tool" in the effort to defeat the president.