Look at Marco Rubio, head bowed, eyes downcast, his expression somberly pensive, one would say a study in some deep sorrow.
While I watched the video I wondered if Marco Rubio was troubled by Donald Trump's words when Trump said, "We were paying them tremendous amounts of money and we're not paying them any more because they haven't done a thing for us,"
Maybe while Marco Rubio listened to Trump say those things he thought of his own grandfather who fled from communist Cuba and entered the United States as an illegal immigrant. Perhaps Marco Rubio was remembering the story of how the immigration judge ordered his grandfather to be deported but later that day had a change of heart and his grandfather was allowed to stay in the U.S. and was eventually granted permanent residency.
Or Perhaps it was that listening to Donald Trump denigrate the people from the poorest countries on the planet for not doing anything for the richest country made Marco Rubio feel ashamed.