It was a serious question.
But as is the case with so many other issues where he was siding with the far-left until running for president, immigration is no different. His first intuition in September, when the refugee crisis flared up, was to say that we had a humanitarian obligation to bring in Syrian refugees. Then when he discovered that conservatives were so ardently opposed to it, he immediately did a 180 and categorically opposed it in his typical attention-grabbing fashion. At that point there was no turning around, and because the media was attacking his new position from the Left, everyone forgot (or never noticed) his first intuition.