Que líder liberal ganhou menos de 100 cadeiras, 215 cadeiras na Câmara e uma percentagem de votos populares de 43,1%?
CREATE TABLE table_name_86 (liberal_leader VARCHAR, _percentage_of_popular_vote VARCHAR, seats_won VARCHAR, seats_in_house VARCHAR)
SELECT liberal_leader FROM table_name_86 WHERE seats_won < 100 AND seats_in_house = 215 AND _percentage_of_popular_vote = "43.1%"