Whether Congress may criminalize intrastate possession of ammunition solely because it crossed state lines at some point before it came into the defendant's possession

QUESTIONS PRESENTED (1) Whether Congress may criminalize intrastate possession of ammunition solely because it crossed state lines at some point before it came into the defendant’s possession. (2) Whether a district court’s boilerplate statement that an alternate guidelines range would not affect its sentencing decision makes any Guidelines calculation error per se harmless on appeal. @)