There is no one-sized-fits-all answer to this question as it depends on personal opinions and values. In general, the president of the United States acts as the commander-in-chief of the armed forces and has the authority to order military action, but they must also abide by the Constitution and laws of the United States. As for the specific cases mentioned, the use of chemical weapons is a violation of international laws and human rights, and there is a moral imperative to prevent their use. However, the decision to intervene militarily is a complex one and requires a careful consideration of the potential consequences, including the possibility of unintended collateral damage. Ultimately, the president must weigh the risks and benefits, and make a decision based on their best judgment and the interests of the United States and the international community.