I don't.
Just look at what happened when Obama left the senate seat in Illinois. That type of corrupt behavior was common before the 17th Amendment came into effect; perhaps even worse, often legislatures could not even agree on anyone to seat.
It's the only one of that period's Amendments to the Constitution that I regard as successful.
Funny thing about Zero. Because he was a “pet” of one of the legislative leaders, Emil Jones, Zero would’ve gotten the Senate seat even if the 17th had been repealed. Food for thought.
As I see it the 17th did not one whit to end or abate corruption in the selection of Senators. It merely moved the corruption from the election process to the nomination process. In my opinion that makes the situation worse, not better.