Re: RD-180 - Russian Built
Yup. Originally, using the RD-180s came with a requirement from Congress to start producing them in the US.
Then Congress decided to not pay for that.
The SpaceX Merlin engine is a derivative of the FASTRAC engine that NASA binned because Congress refused to pay for it.
Then Congress bitches that we have no native rocket engine development programs, until the RD-180 forced funding of things due to embarrassment.
The X-37B is similar. NASA started the program, Congress decided to not pay for it, and the USAF fished it out of the trashbin.