DUI Convictions Cause For Deportation

The United States Bureau of Immigration and Customs Enforcement Department (formerly known as INS) of Homeland Security, commonly called ICE, can begin an initiation of removal proceedings of an immigrant for criminal convictions. The United States Code provides laws relating to convictions of an immigrant that will result in automatic deportation proceedings. Any alien who pleads or is convicted of any of those several types of offenses is subject to deportation. A DUI - called OWI in Wisconsin - conviction is among those convictions.

Under Title 8 of the United States Code (8 USC 1227):

Possession of a controlled substance
Any alien who at any time after admission has been convicted of a violation (or a conspiracy or attempt to violate) any law or regulation relating to a controlled substance is removable. An exception exists for a single offense involving possession for one's own use of 30 grams or less of marijuana.

Possession of a firearm
Any alien who is convicted at any time after admission of a number of firearms or destructive devices offenses is removable.

Domestic Violence, Stalking, Child Abuse, Neglect, Abandonment
Any alien who at any time after entry is convicted of a crime of domestic violence, a crime of stalking, or a crime of child abuse, child neglect, or child abandonment is removable.

See also:
United States Code - U.S. Code Online via GPO Access [wais.access.gpo.gov]
8 US 1227
Wisconsin Drunk Driving Laws