A bill is submitted through several sources, but the general method is to be proposed by a member of the House or Senate. It is then referred to the committee that has the most knowledge about the proposed bill. The committee will consider the bill, and if they so chose to support it, they will present the bill to the House of Representatives. The bill is then debated and voted upon. If they vote in favor of the bill, the bill will go back to the senate for another majority vote. Approval from both Houses is required for the bill to be able to pass on to the President of the United States.
Even after the bill has been passed in every House up until the President, the President still has the power to decline to sign the bill. Refusal of the bill by the President is called veto. If the President votes yes, the bill will finally become a law. However, if the President votes no on the bill, then it will travel back to the Congress to be revised. If the President does