Good article. As the author pointed out, the 17th Amendment wrecked everything.
Centralize it.
Yes, and more.
The post-17A senate was to respond to the people’s needs, and free the senate from corruption and wealthy interests. Progressives built their movement on the promise of cleaner government less subject to corporate influence and bribery, and a more responsive and efficient senate that dealt effectively with the issues of greatest concern to the people.