Rennicke was a member of the far right Wiking-Jugend (Viking Youth) organisation until it was banned in 1994, after which he became a member of the National Democratic Party of Germany (NPD).
In 2009, he was nominated as a candidate for the office of President of Germany by the right-wing parties DVU and NPD[REF][REF] but gained only their votes (4 of 1224)[REF] and was not considered a serious candidate by the German media.