President Obama must have been stunned at the “audacity” of Dr. Benjamin Carson in challenging his core assumptions right to his face in front of thousands of people at the National Prayer Breakfast.

Obama is not used to being challenged, especially in public, even if indirectly and without being specifically named. From the look on his face, it was obvious Obama was none too pleased with Carson’s message or with his “presumptuousness” in presenting it in that forum, while he had to sit still and — remain silent.