A DEMOCRATIC SENATOR who attended a special screening of the movie Fahrenheit 9/11 was asked what he thought was the most revealing part about President Bush. The senator pondered a moment, then said it was the episode where Bush, in close-up, continues to talk to a grade-school class in Sarasota, Florida, for six or seven minutes after he's learned that planes had flown into the World Trade Center. What did it reveal? The senator couldn't say.

My impression, as Bush begins his second term in the White House, is that many in the political community, including the press, still haven't figured him out. One reason is the Bush presidency has emerged quite differently from what was expected. So here are five things about the president that help explain why he does what he does. They aren't the only five aspects of his presidency, but they're five important ones.

* ACTIVIST. The label is usually applied to liberal politicians, rarely conservatives. In Bush's case, it means he has a lengthy agenda and is impatient about enacting it. And it's an agenda--Social Security reform, altering the balance on the Supreme Court, tax reform, reversing cultural trends, a crusade for democracy around the globe--for change. Bush didn't get his activist streak from his father. George H.W. Bush was a caretaker president, dealing with items as they arrived in his in-basket. He lost his bid for reelection in 1992 partly because he didn't have much on his mind for a second term. Bush has a lot, and

* OUTSIDER. Bush is an alien inside the Beltway. His election was the equivalent of getting a green card to work in Washington. He's not part of the social whirl. Nor has he made many close friends on Capitol Hill or around town. What separates him from the Washington crowd? More than anything else, it's religion. Bush is the first president who's a product of the modern evangelical movement, which means his Christian faith is personal, intense, and all-encompassing. It's not a part-time, Sunday-only thing. Leave Washington and you frequently encounter people who say of the president, "He's one of us." You don't hear that in Washington. A Texas friend recently sent the president a copy of Natan Sharansky's book, The Case for Democracy. Bush read most of it and asked Sharansky to meet with him at the White House. Bush praised Sharansky for his years as a dissident in the Soviet Union. To which Sharansky replied, "Now you are the chief dissident of the world."

* PRESS-BASHER. Bush has not made peace with the press, far from it. He views most reporters as political opponents eager to pepper him with gotcha questions. In Colombia last month, he appeared before reporters with President Alvaro Uribe. Bush didn't like the first question about a scuffle two days earlier involving the Secret Service. "This is a question?" he said, and gave a curt answer. Uribe said, "Do you want to get in one more [question]?" Bush said, "That's plenty. No. Thank you," ending the press conference prematurely.