Foes of same-sex marriage are laboring to pay the tab for an epic legal case now before the U.S. Supreme Court, as the movement suffers from fundraising shortfalls that could sap its strength in future battles. ProtectMarriage dot com, the advocacy group defending a California gay marriage ban now under review by the high court, showed a $2 million deficit in its legal fund at the end of 2011 - the third year in a row that expenses exceeded donations, federal tax records show.... "Unless the pace of donations starts to pick up right away, we could soon be forced...