[Wheat Ridge, CO, November 21. Image via Getty.]

WHEAT RIDGE, CO - NOVEMBER 21: Obama supporter Mary Schaeffer argues with Obama critic Gary Henderson during a protest in front of a controversial billboard questioning the President's American citizenship at a used car lot on November 21, 2009 in Wheat Ridge, Colorado. Auto dealership owner Phil Wolf paid $2,500 to have the sign painted, and it has sparked controversy since it was put up the day before. Wolf, 57, said the dealership received more than a thousand calls from throughout the U.S. and Canada in a single day, both in support and against the sign. 'We've had death threats. We had people call and say they were going to firebomb the place last night,' he said, adding that local police provided overnight security outside the dealership because of the threats. Wolf, a supporter of the 'birther' movement, questions President Obama's citizenship. 'We've got to recall our country, the election,' he said. This guy (Obama), is illegal.' He also blamed the President for the massacre at Ft. Hood. 'The cavalier attitude taken by Mr. Obama towards the enemy within us is absolutely horrible. If I had a snake in the house, I would kill it,' Wolf said. Several left-leaning advocacy groups have called on the public to boycott the auto dealership. (Photo by John Moore/Getty Images)