What no one understands is that he powerfully appeals to at least a third of the democrats as well. He has a true coalition and the only delay comes from party insiders rightly readjusting their thinking. It really happened all too fast.
In the meantime he knows how to dominate the news cycle for the next six months. Everyone else is trying to learn now he does it. They do not have enough time.
This means that a truly powerful candidate needs to enter the fray to make it into a real fight and he simply does not exist
In the meantime the Democrats are trying to implement plan B.C, and D ( Bernie, Gore, whoever ) while they still have time. All prospects are going to find a firestorm of failed policies to take the blame for and the press will not be able to lay off.
By the way children he does not have to hide his resume and legitimate accomplishments.
.Why Donald Trump Won’t Fold: Polls and People Speak
The unusual character of Mr. Trump’s coalition by no means guarantees his campaign will survive until next year’s primaries, let alone beyond. The diversity of his coalition could even be its undoing, if his previous support for liberal policies and donations to Democrats, for example, undermine his support among conservatives. And in the end, the polling suggests, Mr. Trump will run into a wall:
Most Republicans do not support his candidacy and seem unlikely ever to do so. Even now, more say they definitely would not vote for him than say they support him.