Trump will not concede.
I don't think he will be in the general election so the point is moot.
The Party will have to bite the bullet and deny him the nomination as un-electable.
At that point, we will find out if Condi's declaration is due to Trump, or is more of the Sherman-esque variety.
He is more electable than some "Free Trade/pro-Amnesty " candidate that won't give White Working Class dems a reason to cross party lines.