Since our founding we’ve had two constitutional crises, where constitutional fetters blocked necessary legislative changes. The first was the breakdown of government by the states under the Articles of Confederation, which the Framers in 1787 corrected by a Constitution creating a proper federal government. Even then, however, the weakness of that government resulted in a second crisis, this time over slavery and resolved only by a Civil War, the Reconstruction Amendments and an enlarged federal government.
The Senate filibuster may trigger a constitutional crisis