You're right about Lou Dobbs being one of the best spokesmen for Trump out there. The reason is that trade and fighting American de-industrialization is Trump's strongest issue (it's the issue he's been discussing consistently for years, as opposed to GOP boilerplate that he has to pay lip service to), which is also Dobbs' main political cause.
It is the Left’s denial of common sense reality, that makes it possible to defeat them. Now at last we have a fighter whom they cannot intimidate—as they have the last few “Republican” candidates.