Define "loudest voices".
If by "loudest voices" you mean "constituents", you're quite a trusting soul in the ways of Washington DC.
Here are the "loudest voices" in that neck of the woods (also known as "The Swamp"):
The loudest voices tend to be the base......conservative or liberal.
Again, in Ohio we have a moderate and a very, very liberal Senator. I would guess, on a state wide basis, the voters voiced their opinion with their elections. We also have the Freedom Caucus’s Jim Jordon. In his district, his voters spoke. My guess is all three’s votes would, and probably should reflect their philosophy that brought them to office.