“And at that time Hanani the seer came to Asa king of Judah, and said unto him, Because thou hast relied on the king of Syria, and not relied on the LORD thy God, therefore is the host of the king of Syria escaped out of thine hand. Were not the Ethiopians and the Lubims a huge host, with very many chariots and horsemen? Yet, because thou didst rely on the LORD, He delivered them into thine hand. For the eyes of the LORD run to and fro throughout the whole earth, to shew Himself strong in the behalf of them whose heart is perfect toward Him. Herein thou hast done foolishly: therefore from henceforth thou shalt have wars. Then Asa was wroth with the seer, and put him in a prison house; for he was in a rage with him because of this thing. And Asa oppressed some of the people the same time.” 2 Chronicles 16:7-10 (KJV)
It has previously been written that Asa did right in the eyes of the LORD (14:2). He also trusted the LORD in a battle against a massive enemy from Ethiopia (14:9-15).
It shows the man, the king of Judah, who did right in the eyes of the LORD, also was a weak, fickle, man and king; when we see him dependent upon an enemy [Syria] against his brethren of the northern kingdom (16:1-6).
We can see in these verses that the word of God is sure, it will stand; and even though kings and presidents do not like it; GOD is correct, and His word will come to pass.
The One we are to rely on is the LORD our God, through His Son Jesus Christ who died on the cross for our sins, was buried, and rose again. You or I cannot depend or rely on anything or anyone else but Him.