The Secret Service is investigating the musician Ted Nugent for making potentially threatening comments about President Obama. Speaking at the annual National Rifle Association meeting last weekend, Nugent said, “If Barack Obama becomes the president in November again, I will be either be dead or in jail by this time next year. … We need to ride into that battlefield and chop their heads off in November. Any questions?” He added: “It isn’t the enemy that ruined America. It’s good people who bent over and let the enemy in. If the coyote’s in your living room pissing on your couch, it’s not the coyote’s fault. It’s your fault for not shooting him.” Democrats have called on Republican front-runner Mitt Romney to denounce Nugent’s comments after Romney’s appearance at the same conference.