The House
♻: https://plus.google.com/u/0/109667384864782087641/posts/Dth8bvhKTKS
..."exact population equality between all districts is not guaranteed and, in fact, is currently impossible, because the size of the House of Representatives is fixed at 435..."
The only constitutional rule relating to the size of the House says: "The Number of Representatives shall not exceed one for every thirty Thousand."
A direct vote would be a 1:1 ratio and remove the need for elections. Alternatively, you could lower this ratio to a management level and still remove elections by implementing a census based election lottery. The only issue with lowering this ratio is that those that get a vote in the House would need to be held responsible and accountable for their vote.