Donald Trump Speaks at Liberty University Commencement

(LYNCHBURG, Va.) — Delivering his first commencement address, President Donald Trump on Saturday urged graduates of a Christian university to follow their convictions but to also be willing to stand up to criticism from others who don't have the courage to do what is right.

Trump kept to an upbeat message in his first extended public appearance since firing James Comey as FBI director this week, saying the lawyer and veteran prosecutor was an incompetent "showboat" and "grandstander.