Why not give them their investigation? IF the congressional Pubbies can show some aggressiveness it should be simple to show how absurd the notions are that:
In fact it may be that the 'Rats are only clamoring for this investigation on the presumption that Republicans will NOT go along with it. If the Pubbies said, "Sure!" and appeared eager the 'Rats might backpedal.
Why not give them their investigation?
NO! That is not the way the Senate is suppose to operate. You don't yield to bullies.