"bound by Oath or Affirmation"
James Madison, as founder, Representative, and President, believed in constitutionalism. Here I want to highlight a quote "Representative Madison" made in 1789 in the first House of Representatives of the First US Congress:
"My idea of the sovereignty of the people is, that the people can change the constitution if they please, but while the constitution exists, they must conform themselves to its dictates".
According to Madison, the other founders, and our Constitution, Congress is not sovereign. Our Constitution dictates a sovereignty of We the People. Congress is created by the Constitution, not the other way around. And, as the Constitution demands, every member of Congress is "bound by Oath or Affirmation" to support the words in our Constitution. (See Article VI of the US Constitution.) Supporting the words in a constitution is the definition of a constitutionalist.
The words "The Number of Representatives shall not exceed one for every thirty Thousand" are still in the US Constitution: Why are members of Congress ignoring their "Oath or Affirmation"?