Its an Old Testament thing, but a lot of Christians hold these things in high regard even if they are not required of Christians. It was symbolic, a gesture. When he said he had prayed and fasted over it, he is praying and fasting for Trump which is itself touching. He was telling Trump that he had the prayers of many, and that he would need to lean upon God and the Holy Spirit in the days to come.
Good explanation
For the none religious just tell them
A Blessing Trumps an Endorsement!
....He was telling Trump that he had the prayers of many, and that he would need to lean upon God and the Holy Spirit in the days to come....
Amen. The OT blessing is one of the greatest gifts, of all.