First: Before the Mods open some whoop-ass on you, I would suggest you stop quoting more than a paragraph or two of articles such as this (as you did in the Mahathir thread, too).
Newspapers and websites have to PAY the AP for the use of such material, and unauthorized reproduction is theft. The Chicago Reader (owners of the SDMB) don’t like that.
Second: Re: the OP–Although I don’t know the exact law, I believe that the Executive Branch has the power to restrict the travel of any of its citizens to foreign countries. Just b/c they’re lawmakers doesn’t make them immune to this. They’re not allowed to break any other laws just b/c they’re lawmakers (well … in theory … there are all of those stories of congressmen getting stopped for DUI all the time and being let go …).