Native English speakers really need to learn proper English ;)
The sad thing is, I am only half kidding: I am almost convinced that omitting "the" here is the result of a development of the language towards forms that were once upon a time simply incorrect... :/
"Where is Congress" is fine with me, because it mainly refers to the group of people. But Parliament brings the building to my mind. I may be wrong, but it sounds weird to me. Where is President anyway?