i said what if you came across the name carlos mergea? he said that's probably a foreign name. i said you're aware, are you not, carlos margea is the name of a federal judge who sits in the same courthouse that this trial is taking place? >> reporter: and this science is being used to pull the ear of the president? >> this science is being used to advocate for these restrictions on voting all around the country. >> reporter: kobach was held in contempt of court repeatedly during proceedings. and after two weeks of arguments the judge struck down his restrictive voting law. >> he got laughed out of federal court. the judge came down hard on him. it exposed the fraudulence behind the claim that voter impersonation and non-citizen voting, it really doesn't exist in any meaningful numbers at all, much less being rampant. >> reporter: with the court ruling kansas residents no longer have to show proof of citizenship when they register to vote.