The foreigners who reside among you will rise above you higher and higher, but you will sink lower and lower. They will lend to you, but you will not lend to them. They will be the head, but you will be the tail. 45All these curses will come on you. They will pursue you and overtake you until you are destroyed, because you did not obey the Lord your God and observe the commands and decrees he gave you. - Deuteronomy 28:43-44
I Recommend reading ALL of Deuteronomy 28 and recognize why America was blessed, and what our future holds from verse 15 to the end of the chapter because we forsook the Lord Our God.
While this is not a precisely transferable prophecy, it does outline a pattern of human events. If God blesses you but then you forsake your faith in the One who blessed you, then you will also lose the blessing. America let itself get bullied from within and without into becoming lukewarm about its biblical faith.