David James "Mac" McAllister (born 12 January 1971) is a German politician of the conservative Christian Democratic Union (CDU).On 1 July 2010 McAllister was elected Prime Minister of the state of Lower Saxony, succeeding Christian Wulff, who resigned following his election as President of Germany. At the time, he was considered a rising star in the CDU, and was even being talked of as a potential successor to Angela Merkel.