the answer would be
The model of legislative representation is the best reflection of the founders’ intentions in setting up American democracy because it offers the best hope for what the Preamble to the Constitution calls “a more perfect union,” one that will bring together war- ring factions and increase harmony.
As James Madison pointed out in Federalist 10, it is inevitable that a republic will contain many groups which vehemently disagree. The bigger a country grows, the more frequent and violent factional clashes are likely to become. Madison was looking ahead to the U.S. that would burst the bounds of the original colonies and create more factionalism. This vision of an expanding, clashing nation makes the trustee model very appealing. A trustee Congressperson is one who will listen to all sides, make an independent judgment, but then go on to explain it so that opponents may be persuaded to change their minds, thus bringing resolution to conflicts.
A trustee is a representative willing to do the principled thing even if the public thinks otherwise. Many issues in our history have seemed so polarized that they were beyond resolution and could not wait for popular consensus. This was the case with civil rights issues and legislation in the 1950s. Technically, African Americans had the right to vote since the passage of the Fifteenth Amendment in 1876