Withdrawing from the United Nations will not only limit America's influence in the world, it would also be extremely detrimental to our national security. What nation would ever sign an agreement or enter an alliance with us if the United States cannot be depended on to honor long standing commitments and treaty obligations. We cannot fight terror on our own. We cannot eliminate Iran's nuclear capabilities on our own. If we are to do this successfully, the United States needs to a part of the world community. If we withdraw, China and/or Russia will fill the leaderships void for us. Are we prepared for that?