As Europe grapples with the mass migration of more than 300,000 refugees fleeing war in Syria, Republican presidential candidate Scott Walker won’t say whether the United States should open its doors to absorb more of the migrants. Walker’s reason for not taking a stand is that he says it would be hypothetical for him to do so since he is not currently the president. “I'm not president today and I can't be president today,” the Republican presidential candidate and Wisconsin governor said when asked by ABC News during a press gaggle on Monday what he would to address the current...