The requirement of bicameralism [i.e., both Houses agreeing on the same law] is as crucial as it is simple. During the debates of the Constitutional Convention, the need for a bicameral (two-chamber) legislature was specifically addressed by James Wilson, who later to became a Justice of the U.S. Supreme Court, known for his scholarship. At the nation's founding, Wilson observed: "Despotism comes on mankind in different shapes... If the Legislative authority be not restrained, there can be neither liberty nor stability; and it can only be restrained by dividing it within itself, into distinct and independent branches. In a single house there is no check, but the inadequate one, of the virtue & good sense of those who compose it."
In short, ignoring the Constitution's requirement that legislation pass if, and only if, it commands the votes of concurrent majorities of both houses of Congress is nothing short of GOP despotism. The broken branch needs fixing so we must all hope that the federal courts step in to halt what the President failed to put an end to: self-styled lawmaking outside the rules of the Constitution.