While high-profile Barack Obama supporters like George Clooney have publicly fretted about how too many showbiz endorsements might taint their candidate in the heartland and offered to support him from a safe distance, new Obamamania cheerleader Scarlett Johansson threw such caution to the wind yesterday, delivering a fifteen minute (!) speech in Iowa that removed all doubt about which Democratic candidate has the support of Hollywood's bustiest, most politically active ingenues. [Open All Night Via Jezebel]