The US legislative process: (1) the originator(s) of an idea (in either the House or the Senate) come up with a bill, (2) this bill is discussed in the appropriate Committee, or is agreed upon in some kind of closed-door session, (3) the bill is introduced on the House or Senate floor, (4) is debated, (5) is (probably) amended, and (6) finally is either passed or not. Then the entire process is repeated in the other side of congress (7-12). After the two Houses of Congress have each passed their bills, which are certainly different, they (13) go to a joint Senate-House Conference Committee which (maybe) reconciles them and (14-15) sends them back for a vote on the compromise legislation. Assuming both houses agree on the compromise, which is far from certain, the approved legislation then (16) goes to the President for signature.

This bill hasn't gotten to (3) yet.