19th by miles...
(Note that I said, “one of”…)
Many Amendments to the US Constitution make me think of nothing so much as a tribe of Pygmies attempting to fix a jet airplane engine that has fallen from the sky.
The 17th Amendment is just one such. It destroys the Senate as a functioning body. What was supposed to balance a reactive and populist House, is now a hyper-reactive copy of the same with massively diluted representation.
The 19th Amendment attempts to universally re-write the Constitution without changing a word. Now, women are men in the same structure of government. Hint everyone - the debt will NEVER be gone, now.