Originally Posted by
Noelene
we are not American, but Australian, so we don't have a Senator to organise a tour, but looks like we have plenty to keep us occupied

Well, a crazy long shot: you could contact the office of Sec. of Education Arne Duncan -- he's not Australian, but he played pro-basketball there for a while, where he met his wife Karen (an Aussie). You might ask if they could put you in touch with Illinois Senator Durbin (or whoever ends up replacing - I hope - Roland Burris) for a tour of the Capitol.
Skip the White House tour -- not as interesting as so many other things in DC. Though people go hoping to catch a glimpse of the current residents, it rarely happens.