You've never been to Illinois or other Democrat-run states, have you ?
Since some of these respondants present the case better than I am able, I suggest you read some of their commentary here:
http://tenthamendmentcenter.com/2013/08/26/repeal-the-17th-problems-to-address/
I particularly enjoyed the one written by a Mr. Gordon Johnson
Here at the blog I have linked to, I find that there are good arguments on both sides of the issue; however, I still favor a repeal of the 17th Amendment - and its REPLACEMENT with language that would address the particulars of the two camps - something I think to be not too difficult.