You can also email your request to your Congressman or state Senators for WH tour tickets. I requested WH tour tickets more than six months in advance and didn't find out if we were able to get them until a week before we left .Be aware that you may NOT take anything w/you but a wallet, cell phone, keys or umbrella. They are dead serious about this. We were just there last week and some people were turned away because they had a camera or a purse. They will allow you to take photos out front w/your cell phone. I stressed out about this alot but it really worked out fine. There is NOWHERE remotely nearby to store your stuff.
FYI, you can also request free "constituent tours" from your Congressman or state Senators. We had a private (just the two of us!) tour of the Capitol Building and Capitol Building Visitor Center, led by a congressional aide. It was way cool to walk the tunnel between the Congressional Office Bldg and the Capitol. You may bring the usual purses, cameras, etc on this tour.Unfortunately, we were not able to meet our congressman.
We also had a constituent tour of the Thomas Jefferson Building Library of Congress .(also accessable by the same tunnel from the Capitol Bldg) This magnificent building was in the movie, National Treasure, 2. Book of Secrets.I got the idea to visit this building from reading this forum before we left.
Lastly, it's a real good idea to leave a number you can be contacted at while in DC. We left a cell phone number and were contacted on it to see if we could bump up our Capitol Bldg tour.
Hope you get the tours you want. MG