A man dressed as a clown disrupted a meeting of Germany's nationalist party on Sunday and hit one of its leading members in the face with a cream pie.The right-wing Alternative for Germany (AfD) was conducting a closed-doors meeting in the central German city of Kassel when two men dressed as clowns entered the room singing Happy Birthday.The men proceeded to the front of the room, where one hit Beatrix von Storch - one of the AfDtarget="_blank"'>The AfD has made gains across Germany on the back of popular discontent with Chancellor Angela Merkel's decision to allow 1.1 million migrants to enter the country in 2015. It is set to enter three state parliaments in regional elections in March.