CHARLES GASPARINO: On the economy, Trump has been crazy like a fox.

The United States had one of the highest corporate tax rates in the world — so high that companies (and jobs) were fleeing to places like Ireland. That’s why it was perfectly sane to lower the corporate tax rate from 35 percent to 21 percent as Trump just did, and presto: Corporations are announcing plans to hire more workers, and the economy, which was expected to slow after seven years of weak growth, is heating up. The markets are predicting that growth with their surge.

Likewise, regulations have been strangling businesses for years while making it difficult for banks to lend to consumers and small business. Trump went out and hired perfectly sane regulators who basically pulled the federal government’s boot off the neck of the business community.

An insane president would threaten a significant tax increase immediately upon taking office following a financial crisis, and then eventually impose one on individuals and small businesses still in recovery.

He’d impose job-crushing regulations on these same businesses as unemployment rose. He’d put a cumbersome mandate on businesses that upends the entire health care system just as the economy was finally turning a corner.

A really insane president would blow nearly $1 trillion on a stimulus plan with little planning and direction, wasting much of the money on boondoggles (see: Solyndra) and then laugh at the lack of “shovel ready” jobs created. He’d then try to spread his delusion to the masses, telling them to ignore historically low wage growth, anemic economic growth and the massive amount of people who dropped out of the work force because the stock market rallied, thanks in large part to the Fed printing money instead of his own fiscal policies.

Is Barack Obama crazy? No, but his post-2008 economic policies were.

I had been assured in 2009 by some very smart people that “business climate” was a myth and didn’t matter.