In this developing story, and with Trump's unpredictability, it is hard to know how serious this may actually end up being. However, as I have long said, no one should underestimate Trump.
At the same time, of course, people like Romney, the Bushes, and many others should also not be underestimated. The major problem here is the big media companies have wanted to keep Trump alive because he is a boon to their bottom lines. This conflict of interests helps counter the power of anti-Trump forces.
At the same time, major donors are, in the main, refusing to donate to what increasingly looks like just another of Trump's business ventures.* So, if money talks, money also stays silent. If Trump really had billions of dollars to donate to his own campaign he would have done so by now, the thinking goes. Instead, his companies are earning money off this campaign! If Trump were not able to fund a full operation, his chances would be hurt.
But, again, what will the media do? I'm not sure I have ever seen so many armchair pundits as now. The Internet is doubtless a cause of this.
In the meantime, there remain plentiful reasons to oppose Trump. Not wanting to support another Trump business boondoggle is one of the latest.
Trump Tries Whip Operation to Quash Convention Opposition
* Trump Campaign Financial Picture
(I will try to get more documentation on this issue soon.)