Larry Kudlow, the veteran financial guru and former economist in the Reagan administration, said President Donald Trump needs to follow up on his tax-cut proposal by rallying support for it as he did during last year’s campaign.

“He needs to get out there on the stump, campaign trail rallies and sell the tax cuts,” he said on CNBC. “This is pro-business, also pro-wage earners, a very populist message on tax cuts.”

Trump’s top economic adviser Gary Cohn and Treasury Secretary Steven Mnuchin on Wednesday revealed a plan to slash the federal income-tax rate to 15 percent for businesses of all sizes. As for personal income taxes, Trump proposes to increase deductions, reduce the number of pay brackets and provide relief for dependent-care expenses.

Kudlow has said the business tax cut will pay for itself by unleashing U.S. productivity and economic growth of 3 percent or more. The U.S. economy has