When a Senator or a Representative introduces a bill, he or she sends it to the clerk of his or her house, who gives it a number and title. This is the first reading, and the bill is referred to the proper committee. The committee may decide the bill is unwise or unnecessary and table it, then killing it at once. Or it may decide the bill is worthwhile and hold hearings to listen to facts and opinions presented by experts and or other interested persons.
After members of the committee have debated the bill and perhaps offered amendments, a vote is taken; and if the vote is favorable, the bill is sent back to the floor of the house. The clerk reads the bill sentence by sentence to the house, and this is known as the second reading. Members may then debate the bill and offer amendments. In the House of Representatives, the time for debate is limited by a cloture rule, but there is no such restriction in a Senate for cloture, where 60 votes are required. This makes possible a filibuster, in which one or more opponents hold the floor to defeat the bill. The third reading is by title only, and the bill is put to a vote, which may be by voice or roll call, depending on the circumstances and parliamentary rules.
Members who must be absent at the time but who wish to record their vote may be paired if each negative vote has a balancing affirmative one. The bill then goes to another house of Congress, where it may be defeated, or passed with or without amendments. If the bill is defeated, it dies. If it is passed with amendments, a joint Congressional committee must be appointed by both houses to iron out the differences. After its final passage by both houses, the bill is sent to the president. If he approves, he signs it, and the bill becomes a law.
However, if he disapproves, he vetoes the bill by refusing to sign it and sending it back to the house of origin with his reasons for the veto. The objectives are read and debated, and a roll-call vote is taken. If the bill receives less than a two-thirds vote, it is defeated and goes no further. But if it receives a two-thirds vote or greater, it is sent to the other house for a vote, the President's veto is overridden, and the bill becomes a law.
Should the e President desire neither to sign nor to veto the bill, he may retain it for ten days, Sundays excepted, and after which time it automatically becomes a law without signature. However, if congress has adjourned within those ten days, the bill is automatically killed, that process of indirect rejection being known as a pocket veto.