The space and aeronautics subcommittee of the House Science Committee has scheduled a hearing this Thursday at 1pm to discuss “NASA-Department of Defense Cooperation in Space Transportation”. According to SpaceRef, the list of witnesses includes John Schumacher (NASA Chief of Staff), “Dr. Johnson-Freese” (probably Joan Johnson-Freese, a professor at the Naval War College who has focused on military space policy issues), Ron Sega (Director of Defense for Research and Engineering and head of the National Aerospace Initiative), and Tom Young (former Lockheed Martin executive who has chaired a number of reviews into NASA and DOD space programs.)
The witness list has been revised. Follow the same link. Last I heard Elon Musk will be testifying via video link from California.