>>15685318 (PB)
POTUS did not stumble. He had fancy leather shoes on – ramp was not only steep, but extremely slippery. (They should have put the ol' red carpet on that thing = safety hazard, no doubt, for anyone but even moreso with fancy slick shoes/soles.)
Found vid of him explaining it for probably the zillionth time: https://youtu.be/lcU74YFJCoI