Lisa Rinna has nothing against Spencer Pratt ... but she sure as hell does not want him to be the next mayor of Los Angeles. "The Real Housewives of Beverly Hills" star was asked what she thinks of SP while walking the carpet for Monday night's American Music Awards -- and she gave an honest assessment. Watch the video for her full explanation ... but basically, she thinks no reality star should be in a top government position -- she even alludes to Trump and issues and blowback he's faced in