Outside groups spent $190 million on the presidential election during the last three weeks of the campaign, with $155 million of the total going to support Republican Mitt Romney. From the Center for Public Integrity:
The total is more than 40 percent of spending by super PACs, nonprofits and other organizations in the presidential contest since the general election began and is more than any other three-week period in the race.
Since Oct. 29 alone, GOP-aligned outside spending groups outspent their Democratic counterparts in the presidential race $84 million to $20 million, according to a Center for Public Integrity analysis of Federal Election Commission records collected by the Sunlight Foundation.
Leading the way over the final weeks were the Republican super PACs Restore Our Future, which spent more than $45 million since Oct. 17, and American Crossroads, which has spent $35 million. The pro-Obama super PAC Priorities USA Action spent $21 million.