The one-time leader of a white supremacist group was arrested on federal charges in California Tuesday, for allegedly threatening a journalist in Brooklyn, N.Y. File Photo by View Apart/Shutterstock March 21 (UPI) -- The leader of a white supremacist group was arrested Tuesday for allegedly threatening a journalist in Brooklyn, N.Y. Nicholas Welker was arrested in San Jose, Calif., on federal charges, according to the Justice Department. Advertisement The journalist was not named in the complaint. Welker, 31, is accused of sending threatening images and messages, including one picture of a gun aimed at the journalist's head with the caption...