Whether defense counsel's failure to advise a client of increased sentencing exposure under 21 U.S.C. § 851, and failure to correctly calculate the advisory sentencing guideline range, and failing to ensure the district fully complied with the statutory procedure articulated in 21 U.S.C. § 851 is constitutional error under Strickland v. Washington, 466 U.S. 668 (1984)

QUESTION PRESENTED Whether defense counsel’s failure to advise a client of increased sentencing exposure under 21 U.S.C. § 851, and failure to correctly calculate the advisory sentencing guideline range, and failing to ensure the district fully complied with the statutory procedure articulated in 21 U.S.C. § 851 is constitutional error under Strickland v. Washington, 466 U.S. 668 (1984). -]