One Senator can stop anything for a time, or indefinitely if supported by a minority of others. Nothing can become law if a minority of 41 of 100 in the US Senate objects. Something could pass unanimously in the US House and still stall forever in the Senate. The rules may not make sense, but they have been in place for decades. It used to be harder to pass anything, but Senate power has been diminished.
Lebanese protesters storm environment ministry amid trash crisis (AP)