Pauline Hanson’s contribution to Aus politics has been helpful - she has driven the Liberals and Nationals so far to the Right that they are unelectable as an alternative government because she has divided the votes on the Right. This makes them unelectable because of Australia’s preferential voting system. More people voted against Trump than voted for him, and a a preferential system means he would not have been elected if he was not able to attract sufficient second preferences to reach 50%. A runoff system has the same effect.