Yes, thats what congress is for in the legislative branch. In the executive branch the EC provides that function.

You're forgetting that we are Constitutionally allowed 1 congress rep per 30k. Right now it's at 1 per 790k. Thats already demagogue territory.

Also, forgetting the 17th Amendment and the original intent of Senators.

You have a very narrow way of rationalizing the destruction of an actual bulwark against tyranny.