Report tallying funding surge in election's final weeks shows massive influx of cash from Super Pacs and the campaignsThe 2012 presidential election broke the $2bn milestone in its final weeks, becoming the most expensive in US political history, according to final federal finance reports. The reports detailed a last-minute cascade of money from mega-donors and an onslaught of spending by the Obama and Romney campaigns and Super Pacs.The final campaign finance tallies filed with the Federal Election Commission on Thrusday included nearly $86m in fundraising for the losing presidential candidate, Republican Mitt Romney, in the election's last weeks.