The problem is that the Doctrine of Laches does not apply to the Constitution. In theory, unless the words of the Constitution are changed via the amendatory process, every word stands.
Unfortunately, every time a federal judge rules on a case, he holds a miniature constitutional convention in his chambers when he writes his opinion. Large swaths of the Constitution have been nullified by judges in their legal opinions as part of the theology of the Living Constitution. The primary purpose of the Convention of the States movement is to put an end to that with structural changes that rebalance the role of the Judiciary.
How far back is "a very long time?"
How does that square with the Obama administration resorting to early 20th century law to justify its actions, such as using 1930's era regulations to take over the internet?
-PJ