Just received another call from them 2 minutes ago. I didn't answer and they didn't leave a voice-mail. I am constantly getting calls from various numbers in the US that appear on my call display as being from Washington.
I trace them but alot of good that will do because, unless they are threatening, etc., there's not much that can be done.
called me, but it was a political survey thing, so i hung up :D
NOTE: always hang up on these things, i have heard stories where if you press a button they ask you to (for example, if they say press 9 to take me off calling list) then you get charged a load on your bill. just disconnect, saves a lot of trouble!