17th isn't even legal as Article V says that no state shall be deprived of its representation in the Senate without its consent. The only way that the 17th could have been legal would have been if all of the states had ratified it before it went into effect.

Of course, no Amendment after the 12th was legally ratified. On a bit of trivia, while the 13th Amendment was not properly ratified, it is the only Amendment to have ever been properly signed by a President, as Lincoln knew that the legality of the 13th would be questioned and wanted to make sure that he made it as legal as possible.

Literally every other POTUS has, when presented with an Amendment, just decided to let it pass by default by refusing to do anything with it for 10 days (Article 1, Section 7), and most of them have kept the myth that "Presidents have no say in Amendments" alive, though the lefties did try to mock The Donald when he implied that POTUS did have a say regarding amendments.

Prior to the 17th, Senators were appointed by the State Legislatures, so they could be reappointed to the job forever, so long as the Legislatures still liked them.

The governors only got to appoint Senators if a Senate seat became open when the Legislature wasn't in session, similar to how it is now.

Federal Income Tax was also ratified in 1913. What sucks is that the Republicans own it as Taft proposed it and tag-teamed with dems to get it ratified a month before Wilson got into office. Ofc that just goes to show that the GOP has been against America for a long, long while now.

That'll happen

Right after they roll out the free cure for cancer