AMC's "Broken Trail" was number one in the ratings Sunday night, besting everything on cable and network television. But it wasn't just the American public who loved the Robert Duvall-toplined Western-the pic was also a hit with President Bush. The movie's star (and Presidential pal) screened the pic at the White House on June 11 and sources say the President enjoyed it. "He was joking during the screening and in good spirits," says one person in attendance.