Article I, Section 8. Clause 11 of the U.S. Constitution reads [The Congress shall have Power ...] To declare War, grant Letters of Marque and Reprisal, and make Rules concerning Captures on Land and Water; ...
In other words, only Congress, not the President, can declare war.
But the current President is conducting undeclared wars in Syria, Iraq and Yemen, and threating Iran. He is unofficially involved in the wars in Israel and Ukraine. He is also making commitments in NATO and with other nations that could thrust the U.S. into more wars, possibly nuclear wars.
Since the 1950's war after war has been launched, including the Korean War, the Vietnam War and then the "Global War on Terrorism," a completely contradictory term, which began the disastrous wars in Afghanistan and Iraq.
The U.S. founders specifically gave Congress exclusive domain to declare wars, because they knew in European history, rulers continually declared wars. They did not want that power in the hands of one person here, and the continuous flow of wars we now have illustrate the reasons why.
But no Constitutional law has meaning if it is not enforced, and Congress has abdicated its responsibility as the Americans, and others across the world are paying the ultimate price.
With Love To All - Dick