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.