Republican voters in Wisconsin, Maryland, and the District of Columbia go to the polls this morning in another round of presidential primaries. Rick Santorum is trying to stop the momentum of Mitt Romney, but is facing an uphill battle after Romney received the endorsement of several of the state’s top Republicans. In other headlines: seven were killed in a deadly shooting spree at a Christian university in Oakland, California; the Supreme Court rules officials can strip search after an arrest no matter the crime; and Syrian officials have agreed to comply with a UN brokered peace plan by next Tuesday.