The Bible tells us to "be subject" to our leaders as long as they don't tell us to disobey God. That means among other things that you have to pay taxes and obey the laws of the land. You are only supposed to "follow" Jesus. If you disagree with the President's policies you can do so, and within the limits of the laws of this land, protest against them and seek to have them changed in a respectful manner because of his office not because of your personal feelings towards him. If leaders are immoral and corrupt then they should be legally removed from office.
Romans 13:1 Let every person be subject to the governing authorities. For there is no authority except from God, and those that exist have been instituted by God. 2 Therefore whoever resists the authorities resists what God has appointed, and those who resist will incur judgment. 3 For rulers are not a terror to good conduct, but to bad. Would you have no fear of the one who is in authority? Then do what is good, and you will receive his approval, 4 for he is God's servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God's wrath on the wrongdoer. 5 Therefore one must be in subjection, not only to avoid God's wrath but also for the sake of conscience. 6 For the same reason you also pay taxes, for the authorities are ministers of God, attending to this very thing. 7 Pay to all what is owed to them: taxes to whom taxes are owed, revenue to whom revenue is owed, respect to whom respect is owed, honor to whom honor is owed.