This ad paid for by Mitt Romney for President

This ad paid for by Friends of Connie Mack

This ad paid for by Majority PAC and Connecticut’s Future PAC

This ad paid for by Romney for President

This ad paid for by Elizabeth Warren for Senate

This ad paid for by Romney for President

These two ads were paid for by Romney for President and Obama for America

This ad paid for by Obama for America.

This ad paid for by the pro-Romney Americans for Prosperity Super PAC

This ad paid for by the Campaign for American Values Super PAC

This ad paid for by pro-Obama Super PAC Priorities USA Action.

This ad paid for by pro-Obama Super PAC Priorities USA Action.

This ad paid for by the Mitt Romney campaign.

This ad paid for by pro-Obama Super PAC Priorities USA Action.

This ad paid for by Priorities USA Action.

Ad paid for by Obama for America.

Anti Tom Latham ads paid for by the House Majority PAC.

Anti Leonard Boswell ad paid for by Tom Latham for Congress.

This ad paid for by the Ron Paul for President Campaign Committee.

This ad paid for by the US Chamber of Commerce, which in spite of its misleading name is not a government agency, but one of the largest lobbying groups in the country.