OK, call me silly, but what does this article have to do with anything current?
Is there some issue where this argument would come into play, or is it just a general diatribe?
The issue in play is that a Senator elected by a state’s legislature would be accountable to that legislature.
You may recall that one of the issues put forward by R. Reagan when running of office was the nasty habit of a spend thrift congress was to pass laws imposing on the states “unfunded mandates”.
A Senate elected by state legislatures would be unlikely to impose such laws on the states that elect them.