Brent Lang Executive Editor of Film and MediaMichael Shannon will portray U.S. Senator Joseph McCarthy, a venal politician so evil he spawned his own -ism, in the aptly named film “McCarthy.”The two-time Oscar nominee, known for off-beat performances in the likes of “Nocturnal Animals” and “Revolutionary Road,” will try to find the dark heart of the demagogue who used show-trials and red-baiting to rise to power on a wave of anti-communist hysteria.