Drunk driving is a crime - having a glass of wine with dinner is not.
Are you purposely being obtuse on this issue?
You may choose to defend a convicted drunk driver, no matter the details of the conviction. I am not being obtuse. Any alien that is apprehended and subject to due process that results in a deportation order, should be deported as a person that was convicted of a crime. I believe that not all single mothers (from your drunk driving analogy) should be rounded up and given a breathalyzer and the opportunity to confess.