bill hopper
... that the spaces between the shelves of the United States Senate bill hopper get shorter near the top as so few proposed bills became law?
... that the spaces between the shelves of the <a href="./United_States_Senate" id="mwCKY" rel="mw:WikiLink" title="United States Senate">United States Senate</a> <b id="mwCKc"><a href="./Bill_hopper_(furniture)" id="mwCKg" rel="mw:WikiLink" title="Bill hopper (furniture)">bill hopper</a></b> get shorter near the top as so few proposed bills became law?