Yes, Jesus is going to overthrow the authority of all political kings in this world when He comes to rule for 1000 years. Also, i'd like to point out, I'm not sure if any US president has ever been God's "agent" on the political field. In my 21 years of life, from what I remember, no president has really acted fully on God's behalf (like one of Israel's/Judah's kings.) America is not like Israel/Judah.
That is not to say God cannot use politicians who are not followers of Him - He did use Nebuchadnezzar on several occasions. No one can ever do something that will overthrow God's plan for the world. It's possible Jesus allows some people to do certain things to further the coming of God's Kingdom. Not to say, He supports everything they do. He certainly didn't support all that Nebuchadnezzar did. But He is more than capable of using a king.
God bless you. This has been a fun discussion. I hope the day finds you well.
Don't forget Cyrus...
2 Chronicles 36:22
In the first year of Cyrus king of Persia, to fulfill the word of the LORD spoken through Jeremiah, the LORD stirred the spirit of Cyrus king of Persia to send a proclamation throughout his kingdom and to put it in writing as follows:
2 Chronicles 36:23
"This is what Cyrus king of Persia says: 'The LORD, the God of heaven, who has given me all the kingdoms of the earth, has appointed me to build a house for Him at Jerusalem in Judah. Whoever among you belongs to His people, may the LORD his God be with him.'"
Ezra 1:1
In the first year of Cyrus king of Persia, to fulfill the word of the LORD spoken through Jeremiah, the LORD stirred the spirit of Cyrus king of Persia to send a proclamation throughout his kingdom and to put it in writing as follows:
Ezra 1:2
"This is what Cyrus king of Persia says: 'The LORD, the God of heaven, who has given me all the kingdoms of the earth, has appointed me to build a house for Him at Jerusalem in Judah.
Isaiah 14:32
What answer will be given to the envoys of that nation? "The LORD has founded Zion, where His afflicted people will find refuge."
Isaiah 41:27
I was the first to tell Zion: 'Look, here they are!' And I gave to Jerusalem a herald of good news.
Isaiah 45:1
This is what the LORD says to Cyrus His anointed, whose right hand I have grasped to subdue nations before him, to disarm kings, to open the doors before him, so that the gates will not be shut:
Isaiah 45:13
I will raise up Cyrus in righteousness, and I will make all his ways straight. He will rebuild My city and set My exiles free, but not for payment or reward," says the LORD of Hosts.