Utah has over 3 million residents.
Utah has 4 members of the United States House of Representatives.
Each congressional district is approximately 750,000 people.
Utah has 1,334,000 "active" voters and about 198,000 "inactive" voters. An "inactive" voter hasn't voted in the last two previous general elections.
Let's assume active voters are equally distributed, with approximately 334,000 active voters in each congressional district.
Would you be okay with fewer than 200 people (and only from one political party) picking the replacement should a member of Congress resign?
Did you know that's what happens when a United States Senator resigns and needs to be replaced?