Which war?
US fought many many wars.
It caused a decrease in production and power.
It caused a decrease in production and power
See: COLD WAR
The war made the US an important power in Asia.
The US emerged from the Spanish American War as a rcognized World Power.
On a very controversial basis, US President Lincoln pushed the envelope of his Constitutional powers throughout the US Civil War. He often made apologies for what many of his fellow Republicans and of course Democrats, were not the proper uses of his authority. The fear that if unchecked, Lincoln was setting dangerous presidents.
For the most part Presidents have ignored the War Powers Act partly on the grounds that it is Unconstitutional for one branch of government to either increase or decrease the power of another branch. separation of power
The US and the Allies won the war and the US gained control of the Philippines, causing it to become a world power.
increase
congress
Yes. The US Constitution, Article One says, "Congress shall have power to ... declare War."
Expressed