One instance - the Second Amendment. One of my great heroes is H. L. Mencken. In his book, Notes on Democracy - written in 1925, when you still could have bought a Thompson submachine gun in your local hardware store, Mencken declared the Second Amendment essentially a dead letter.
If the principle of a Republic had been upheld it would never have been suggested that a referendum could be held in which your fellow citizens could vote away your firearms rights. Strictly speaking, of course, protection against local actions of that nature should come from the State constitutions rather than the federal one. As for the notorious federal law of 1935, I never saw a comment by Mencken on that. The point is that the Liberals at that time hadn't yet invented the doctrine that the Second Amendment doesn't say what it says. So the law doesn't deny the right to possession of any type of firearm, it merely places a tax on the exercise of that right. I am sure Mencken would not have approved.