STEPHEN MOORE: Why the Left Has Been So Wrong About the Trump Boom.

But so far the Trump haters have missed the call on the economy’s trajectory. Doubly ironic is that the same Obama-era economists who are trashing Trump’s increasingly realistic forecast of 3 percent growth are the ones who predicted 4 percent growth from the Obama budgets. Obama never came anywhere near 4 percent growth, and at the end of his second term, the economy grew at a pitiful 1.6 percent.

Under Obama, free enterprise and pro-business policies were thrown out the window. What was delivered was the weakest recovery from a recession since World War II, with a meager 2.2 percent average growth rate. Middle America felt it, which is why Trump won these forgotten Americans.

One reason that economist Larry Kudlow and I and others assured Donald Trump that 3 to 4 percent growth was achievable was that Trump could capitalize on the underperformance of the Obama years. Under Obama, business investment fell almost two-thirds below the long-term trend line — thanks to higher taxes on investment. Now, partly in anticipation of the tax cut, business spending keeps climbing.

“Get the hell out of my way!” the wise man once said.