Trump preaching to the choir and Trump preaching to those who see him at face value are two wholly different scenarios that will result in two wholly different results.
Trump's big disadvantage is that he has to fight hard to sustain the illusion (and the votes that go with it) that the RNC first alchemized and of which Trump then took for his own from them.
All the Dems have to do is incessantly expose the illusion that Trump has exploited for what it really is to everyone but the far right hard core base who would rather believe in the illusion than face reality.
Sure, there are those Repubs who would treat Trump as if he were Typhoid Mary yet still vote for him purely out loyalty to party, and then there are those who would vote for him simply because they, for one reason or another, have a seething hatred for Hillary.
But that won't be enough to hand Trump the White House. Not by a long shot.
When it comes down to it, it seems to me this election is going to play out the same way as the last, with the same end result. Different players, different styles, same game plans, same final score.
Warren firing the opening shots is merely the start of an intense withering barrage that Trump is going to have to somehow survive. He may be mercurial, but a miracle maker he is not.
As stated earlier, winning a Primary whose electors are party sympathizers is a wholly different story when attempting to win a general that's rife with voters who def don't see Trump through Rove tinted glasses.
The one thing I do give credit to Trump for is how he got around this Conservative sponsored juggernaut:
edit -
http://www.nytimes.com/interactive/...sidential-election-super-pac-donors.html?_r=0