A bill goes through both houses to insure that it is read, considered, argued, and that there is a consensus on the bill. This is the way a democracy works. Sometimes it is messy and may not work the first time, but one of the best way a democracy works is through compromise.
it is so that, one branch does not bypass another.
Congress DOES have the power to pass a bill into law over a Presidential veto.
The term for re-passing a bill after a veto is called "overriding" a veto. A bill which is passed by a 2/3 super majority vote in both houses of Congress following a Presidential veto is a law.
Congress can override the President's veto of a bill. They can do so by submitting the bill to both the Senate and the House of Representative for vote and both houses must reach a two-thirds vote in favor of the bill becoming a law.
mccarthyism
The Legislative branch (Congress) can override the President's veto on a bill with a two-thirds vote from both the Senate and the House of Representatives.
After a bill passes both Houses of Congress it goes to the President for the final signature.
Two thirds of the House and two thirds of the Senate. :) Two thirds of the House and two thirds of the Senate. :)
Congress needs 2/3 majority from both the House of Representatives and the Senate in order to do that.
The president
When a new bill is to be passed, both the parties of the congress are made to vote. If the number of votes are high, the bill is passed.
After a bill has been vetoed it has the choice of either being brought back by a 2/3 majority vote from the senate to override the Presidents veto. Either that or the president goes and sux a dick