What powers that were reserved for Congress are now in the hands of the president?

Some powers that were traditionally reserved for Congress but have shifted to the president include the authority to engage in military actions without a formal declaration of war, often justified under the War Powers Resolution. Additionally, the president has increasingly taken on a significant role in foreign policy, negotiating treaties and agreements that may not always receive Congressional approval. Furthermore, executive orders allow the president to implement policies unilaterally, sometimes bypassing legislative processes. This shift reflects a broader trend of expanding executive power in areas traditionally governed by Congress.