TSA Penger ID Check at BWI Airport?

It is easy to go to an airline site and find out what penger ID is accepted by the airline. However, BWI penger ID checks are now done by TSA, and I cannot find a URL that lists everything they will and will not accept. My Iraqi friend's pport series has been cancelled, and he has not yet been able to get a new pport from Baghdad. Because of this, he also does not have a US driver's licence. He has an Iraqi drivers's license and a US college ID, along with his old I-20 and student visa (in the old pport). He has an application for asylum and a credit card. What else will the TSA folks view as credible ID so he can accompany my on a flight between Baltimore and Boise?