Is America’s collapse essential for the Tribulation era and Messiah’s 2nd-Advent?

Has anyone pondered why the United States is not an integral player in end-time events but China-Russia-Iran/Islam-Israel play a focal role? Is the current ideological-political-financial-moral-ethical-decline in America essential for the Tribulation to manifest?

Is it possible that our Creator will eliminate the United States as an ally of Israel thereby making Israel wholly dependent upon Jesus’ intercession when the nuclear armed nations attack Jerusalem prefacing Messiah’s 2nd-Advent and the Millennial Kingdom?