I'm not sure reducing the overall number of Senators is really a good way to go, either.
(But ignore me! I'm not a member of TPP, just chiming in!)
We could then have two classes of regional Senators, a set of four elected alongside the President, and another set of four elected alongside the At-Large Senators.
That would increase the overall number of Senators to 13.
(Off-topic- Wouldn't it be interesting to fun to the "Senior Senator from the Mideast" or the "Junior Senator from the Southeast", etc?)
Ignore me too, but wouldn't abolishing at-large senators mean a huge disparity in voting power? Cause the bigger regions in Atlasia have more than twice the population as some of the smaller ones?