Fuzzy math: Democrats spend big to draw small-dollar donors

Montana Gov. Steve Bullock was told how he could qualify for the next presidential debate, but it didn't make much sense: Spend $60."You spend $60 on Facebook right now to get a $1 donor," Bullock said last week while campaigning in Iowa , referring to the 130,000 donor threshold that is one of the requirements to reach the debate stage in Houston next month.Facing a Wednesday deadline, a handful of Democratic White House hopefuls are racing against time — and odds — to qualify, tryi