Theodros v. Gonzales, 490 F.3d 396 (5th Cir. Jun. 25, 2007) (false claim of U.S. citizenship for purposes of obtaining private-sector employment triggers removability under 8 U.S.C. 1227(a)(3)(D) and 1182(a)(6)(C)(ii)(I)), distinguishing United States v. Karaouni, 379 F.3d 1139, 1145 (9th Cir. 2004).