When I interviewed Trump on the day before the primary, he emphasized his positive message of optimism, growth, and national security. In recent weeks, he has talked about how America has been losing key battles around the world, whether it's the terrorist group that calls itself Islamic State, Russia, Iran, China trade, immigration, or the declining economy. And he has loudly proclaimed: If you elect me, we will start winning again. Everywhere.
Asked what a President Trump would do about the risk of recession, he reeled off a series of tax cuts, deregulations, and federal budget cuts. He knows the country is in revolt against Washington, D.C., and he plays to that with his program.
He talks about oil independence and opening up federal oil fields.
He talks about bombing IS oil trucks.
He mentions Anthony Scalia and Clarence Thomas as models for Supreme Court appointments.
He talks about creating jobs -- over and over.
He talks about strong border controls to fix the illegal immigration problem.
He talks about a strong military and renewed support for our military veterans.
He proposes a total repeal of Obamacare, with HSAs and crossing state lines for more competition.
Perhaps most interesting, he is railing against big corporations and their big money deposited in super PACs. Unlike a typical Republican, he hangs out Big Oil, Big Pharma, Big Insurance, and Big Lumber as examples of the corrupt monetary influence on American politics.
I asked him if he intended to change the Republican party. He snapped, "You bet I do. It needs changing."
There are soft spots in Trump's proposals, most particularly on China trade. His tariff threat is worrying Wall Street and pro-growth free-traders like myself. More work on that will come.
But apart from even these details, Trump's message is clear: America must start winning. And yes, we must make America great again.
Positive and optimistic. Growth. Leadership. Clarity. It worked in New Hampshire.
Janet Yellen, on the other hand, nearly fell off the financial ladder.
Message matters. There's a lesson here for all of us.
Commentary by Larry Kudlow, a senior contributor at CNBC and economics editor of the National Review. Follow him on Twitter @Larry_Kudlow.