They probably won’t be able to award anything with only one bidder.
Air Force procurement is a disaster. I have one contract with the AF. Original bids were submitted in 2009 and it was awarded June 2015. No actual work from it yet.
ULA was sole source on DoD launches for years so that’s what the Air Force is used to. It’s certainly not what they expected since certifying Falcon 9 earlier this year.