Bills can be initiated by any member of Congress but are usually initiated by party leaders in Congress or committee chairs, often on behalf of the president.
Bills need to be signed by a sponsor - and there can be many co-sponsors.
step 2- committee stage
After they have been initiated (the first reading) bills are passed on to the relevant committees (in both House and Senate) where they are debated and amended (or ‘marked up’).
Committees can choose whether or not to ‘hear’ a bill, and bills that are not heard will die in committee.
step 3- floor debate and vote
further amendments are possible
votes are taken
step 4 conference stage-
Legislation often has two different versions in the House and Senate that need to be reconciled.
A conference committee may be formed to reach a compromise, or congressional leadership may handle it.
The reconciled bill must pass a vote in both chambers; if it fails in one, it dies.
step 5- president
Once a bill has passed all of these stages it must be signed into law by the president. A president has the power to veto (not sign) a bill and send it back to Congress.
A 2/3 vote in both chambers of Congress can override a veto, as happened to Obama in 2016 with the Justice Against Sponsors of Terrorism Act.