The sripture does support the death penalty in the New Testament.
Romans 13:1-4: Let everyone put himself under the authority of the higher powers, because there is no power which is not of God, and all powers are ordered by God. For which reason everyone who puts himself against the authority puts himself against the order of God: and those who are against it will get punishment for themselves. For rulers are not a cause of fear to the good work but to the evil. If you would have no fear of the authority, do good and you will have praise; For he is the servant of God to you for good. But if you do evil, have fear; for the sword is not in his hand for nothing: he is God's servant, making God's punishment come on the evil-doer.
Do you get that last part? The government...appointed by God...has a sword in his hand to punish the evil-doer.
I am a theologian (Yes..Th.D.)...and that passage is speaking of 1) War and 2) Capital punishment. God gives the government the authority to punish the evil-doer..whether that evil-doer is a country or a person.
Now...if you claim to be wanting to follow the teachings of Jesus on this subject...I suspect you will stop attacking the president...because it is commanded in this scriture and in 1 Peter 2:13-17. I would also suspect you should be as equally disgusted at Abortion or else you are a hypocrite in the opposite direction!
Thank you for the lesson, I was trying to find on my own for future reference.