Unconstitutional? Extra-Constitutional? What’s the difference?

An extra-constitutional action may be legal or illegal.
Is Federal Infrastructure Spending Unconstitutional?

So what was the understanding in 1787-90? I have pieced this together over many years. In a nutshell, here it is:
How the False Stories Against An Amendments Convention Got Started

Opponents then — like their successors today — claimed they were protecting the Constitution. But what they actually were (and are) doing is protecting judges and politicians who abuse their positions by changing constitutional rules without following the normal democratic process.
Responding to Fears of an Amendments Convention

Of course, the political establishment doesn’t want you to exercise this constitutional right. So they use the same tactics vote-suppressors use: disinformation and fear.
New Article: The President is Not Violating the Foreign Emoluments Clause

The study indirectly absolves President Trump of claims that he is violating the Constitution by receiving profits from enterprises whose customers include foreign governments.
It seems this blog was right about natural born citizenship all along

A new study confirms this blog’s conclusions in all important details.
Correcting Hillary Clinton’s Misconceptions About Those Favoring An Amendments Convention

None of the amendment campaigns . . . favors the open-ended convention needed for radical change. All of their model legislative applications severely limit the convention’s scope.
Schatz’s ignorance of our Anglo-American legal heritage is part of a much wider problem

Educated citizens who enter politics eventually learn that deep ignorance is not unusual among elected officials. To idealists, the discovery can be a shock.
The Poetry in the Constitution’s Preamble

Morris’ approach was unique and has served as an inspiration for constitution-makers ever since.
Where the Constitution’s Word “Convention” Came From

Fortunately, by the time the Constitution was written, this verbal confusion had been pretty much been sorted out.
Jon Caldara interviews Rob Natelson on John Dickinson, “The Most Underrated Founder”

Watch this interview and learn what we owe to John Dickinson.
II Senior Fellow Natelson’s Research Again Relied on by a Supreme Court Justice

Rob’s research, published in the 2008 article, showed convincingly that Justice Thomas was right to be skeptical.