What are the two ways a bill may become a law without the Presidents signature?

Congress (House as Senate) can override a President's veto by passing the bill by a 2/3 majority. This is the only way that a bill can become law without a Presidential signature. In the United...

Generally, because the Presidency is a day-time job whereas Congress has extended recesses, it is very rare that a President doesn't either sign a bill into law or veto it. If he vetoes it, it goes...

If a president vetoes a bill, the congress can override the veto by voting in favor of it, with a two-thirds majority, in both houses. There is a link below to an article on veto overrides.

A bill can become without the president's signature if both chambers of Congress pass the bill that is subsequently vetoed by the president. The president's veto can then be overturned by a 3/4...

Yes, after the President veto's a bill, it goes back to Congress and if they can get a 2/3 majority to vote for it then it becomes law.