We both live in Oregon, right? What are the odds of removing Wyden or Merkely with even a moderate GOP
such as Gordon Smith, let alone somebody like Ted Cruz? You're hoping for some massive shift that defies reality. I'm sure it feels nice ideolgically to hold firm on your view, but reality makes it a completely unreasonable expectation.
There are 14 states with two Republican Senators.
There are 17 states with one Republican Senator.
Subtotal 31 states with one+ Republican Senators, or 62%.
There are 19 states which have no Republican Senators, or 38%. Of those 16 have a democrat Governor as well (exceptions New Mexico, Michigan, New Jersey). And of the 19 states, 17 voted for Obama in 2014. Of those 19 states, 15 have democrat domination of state legislatures.
I therefore conclude that 30-40% of the states are out of reach for Republicans at this time.