A 10-year-old girl was barred from singing a President George W. Bush-bashing ballad at her elementary school talent show because her principal deemed the song inappropriate and too political. "Dear Mr. President," performed and co-written by pop star Pink, criticizes Bush for the war in Iraq and policies including his stance on gay rights. Nancy Shoul said her daughter Molly should be lauded for choosing lyrics that are full of substance and that the ban violates her daughter's right to free speech. "If this was a student singing a pro-administration song, no one would quibble with it," Shoul said Thursday....