What bothers me most is not "how crazy it is that a stupid moron should be so popular" but rather that Mikey seems determined to insult an entire subsection of America on the way, while also misunderstanding what Trump represents and why he's so popular.
One reason is that the actual votes are still a seriously long time away, dragging out over something like four or five months and the first being in February. In an election-mad country it's not totally outrageous that a) there should be loads of candidates representing all sorts of political position, and b) that in the earlier days of polling, a candidate representing the "new" should do well.
Bad news for Carson, though -- it seems like in recent days his poll ratings have slipped drastically, leaving Trump still massively in the lead but allowing the "actual" candidates in Rubio and Cruz into the race.
But Trump represents a bit more than that. The GOP has been shifting slowly to the right, but its supporters have shifted there even faster. Tea Party, anyone? And that anti-establishment trend is still going strong. What Trump represents is a legitimate irritation at how normal politics has been working -- rather like Corbyn in the Labour party, as a matter of fact, which is why Mikey's surprise at Trump's popularity is so astounding.
Anyway, there's very little chance that Trump will be able to sustain this -- but, if he does, it will be in large part due to everyone else failing to get why he is so popular.