The Seventh Circuit determined that a lawful permanent resident who commits a controlled substance offense that stops the accrual of his continuous residence, as required for cancellation of removal, cannot restart that clock by leaving the United States and re-entering. The court deferred to the Board of Immigration Appeals' decision in Matter of Nelson.
The full text of Isunza v. Lynch can be found here: http://media.ca7.uscourts.gov/cgi-bin/rssExec.pl?Submit=Display&Path=Y2016/D01-11/C:15-1286:J:Shah:aut:T:fnOp:N:1685168:S:0