The domain is registered to 'US House of Representatives Republican Conference' and should rightfully be GOP.HOUSE.GOV.
Excerpt from RFC 2146:
C) Subsidiary, non-autonomous components of top-level or other entities are not eligible for separate registration. International organizations listed in this document are NOT eligible for registration under .GOV. Subsidiary components should register as third-level domains under their parent organization. Other Federal entities may apply to the FED.US domain."
Comment from Roblimo: Well, that's Mackie's opinion. I disagree, at least in part. I believe a political organization - and that's what a political party is; it's certainly not a government agency - should be an ".org", not a ".gov". BTW, I don't see this as a Republican vs. Democrat thing, either, but as evidence of general Congressional cluelessness. Anyone else care to weigh in on this?