(November 29, 2016, 10:10 AM EST) -- OKLAHOMA CITY — A new Oklahoma law limiting who can sell American Indian artwork in the state violates the U.S. Constitution and conflicts with federal law, a Native American artist alleges in a lawsuit filed Nov. 22 in the U.S. District Court for the Western District of Oklahoma (Peggy Fontenot v. E. Scott Pruitt, No. 16-1339, W.D. Okla.)....