President Bush was unaware that some of his players allegedly were using performance-enhancing drugs when he was the general managing partner of the Texas Rangers, the White House said yesterday. As the Daily News first reported Sunday, Jose Canseco claims in his upcoming book, "Juiced: Wild Times, Rampant 'Roids, Smash Hits and How Baseball Got Big," that he introduced Rafael Palmeiro, Juan Gonzalez and Ivan Rodriguez to steroids after he was traded by the Oakland A's to the Texas Rangers in 1992. Canseco claims Bush must have known about his players' illegal drug use but did not address it. "If...