Whether the Sixth Amendment's effective-assistance guarantee applies to counsel's advice, or failure to advise, about the deportation consequences of a guilty plea.
Holding
Yes. Advice concerning deportation is not categorically outside the Sixth Amendment, and Padilla's claim is governed by Strickland v. Washington.
Reasoning
The Kentucky court relied on the distinction between direct and collateral consequences of a conviction. But the Supreme Court had never used that distinction to define the constitutional scope of reasonable professional assistance under Strickland. The Court found the distinction particularly unsuitable for deportation claims.
Although removal proceedings are formally civil, deportation is tightly connected to the criminal process. For nearly a century, criminal convictions have triggered immigration consequences, and modern immigration law makes removal nearly automatic for many noncitizens convicted of specified offenses.
Deportation is an especially severe consequence—often the equivalent of banishment or exile—and may matter more to a noncitizen defendant than the prison sentence. The Court therefore treated deportation as an integral part, and sometimes the most important part, of the penalty flowing from a guilty plea to a deportable offense.