The National Rifle Association (NRA) sent a letter to Senate leaders on Wednesday evening urging the chamber not to confirm Dr. Vivek Murthy, President Barack Obama's nominee for Surgeon General, over Murthy's belief that gun violence presents a major public health threat. The letter was issued on the same day that Sen. Rand Paul (R-KY) said he would place a hold on Murthy's nomination over similar concerns. "Dr. Murthy's record of political activism in support of... (GunPolicy.org)