Quick! What's the 17th?
The Senate of the United States shall be composed of two Senators from each State, elected by the people thereof, for six years; and each Senator shall have one vote. The electors in each State shall have the qualifications requisite for electors of the most numerous branch of the State legislatures.
Big deal, right? Prior to the passage of the 17th, the various state legislatures appointed their two US Senators, for the purpose of protecting the interests of the states.
It was with great amusement that I visited the Daily Kos to observe the wailing, anguish, and knashing of teeth over the 'betrayal' of Bayh to the Democratic Party. You know what? If you're in any state other than Indiana, you can get bent! Bayh isn't your Senator! Project the failings of your party onto your own Congress Critter!
Now, I know- it's impossible to reconcile the votes of Bayh and Dick Lugar and conclude that both could possibly have had the interests of Indiana in mind. And, prior to the passage of the 17th, the state's legislature could have observed the very thing, and recalled one or the other, and installed a new Senator.
While the push for direct election of Senators was populist inspired, and while it did take that power away from the states (the real Point Of Beginning for the diminuation of State's Rights, btw), it empowered a new class like never before- corporate donors, which tend to be national interests.
Ironically, it was also intended to diminish the influence 'industrialists' had over Senators. Oops! The anticipated main attraction in Bayh vs. Coats was to be the attacks against Bayh's corporate interest wife, and against Coats' corporate interest last 12 years.
This wouldn't be, couldn't be, with legislature appointed Senators. There would be no campaign committees for Senators. They wouldn't spend their time chummying with lobbyists for the purpose of trading law for war chests. They would have to please their statehouse.