On the Webcast Extra, Joan Biskupic of Reuters details the upcoming Supreme Court case tackling the nation’s same-sex marriage laws. She says this time the justices will actually take on the case to standardize laws across states. ABC News’ Pierre Thomas explains former CIA Chief David Petraeus’ decision to plead guilty to providing classified information to his mistress. Is there a double standard that favors people in power? Also, POLITICO’s Josh Gerstein reports on the Obama administration’s attempts to stay a Texas judge’s ruling halting his executive action on immigration. And Doyle McManus of the Los Angeles Times describes the complicated relationship between the US and Iran as both nations battle ISIS.