Such a person doesn't really represent the majority of people in his or her district. In other words, you have a major problem with representatives who represent a minority of citizens rather than the majority.
而且多人競逐下，他可能只吸引了十分之一的選民就可以當選，所以他不能充分代表選區的多數民意；換句話說，他不代表 majority，他代表 minority，這是一個很大的問題。