Obama slammed by attack ads in final weekend of campaign

In the final weekend before Election Day, President Barack Obama was hit with more than $37 million in attack ads; Romney faced less than $1 million in attacks, according to reports filed with the Federal Election Commission.

Outside spenders dropped roughly $56.3 million on the presidential election on Nov 2-4, with more than two-thirds of the ads being negative, a Center for Public Integrity analysis shows. On all federal races, outside groups spent roughly $73.3 million over the weekend. The biggest outside spender, not counting party committees and traditional political action committees, was the conservative super PAC American Crossroads, co-founded by GOP strategist Karl Rove.