Remember, the senate was split 50-50 after the 2000 elections. Even though Cheney held the tie-breaking vote, Bill Frist was persuaded to accept a power sharing agreement with the Democrats which lasted until Jeffords was flipped.
Bush acquiesced to the creation of the TSA to provide more job for government union hacks as a price to pay for getting what he deemed more important security measures passed in the wake of 9-11.
So it’s Frist and W’s fault.