05). We also review de novo the interpretation of the Federal Rules of Evidence. See United States I. Campa, 459 F.3d 1121, 1174 (11th Cir.2006); Pickett I. Iowa Beef Processors, 209 F.3d 1276, 1279 (11th Cir.2000). And the issue of whether to recognize a privilege under Federal Rule of Evidence 501 is a mixed question of