HBO’s upcoming movie “Game Change,” which zeroes in on John McCain’s 2008 presidential run, paints a less-than-flattering picture of his running mate, Sarah Palin, a new trailer shows. In the clip from the film — which is based on the bestselling book by Mark Halperin and John Heilemann — actress Julianne Moore, as Palin, joins the campaign and, subsequently, melts down under too much pressure:
