Trump is already walking back his most important promise on the economy

Lucas Jackson/Reuters President Donald Trump rose to power in a surprise electoral victory after promising a disaffected electorate that he could more than double the nation’s rate of economic growth to 4%. Barely a month into Trump's presidency, his advisers have already downgraded that rather elevated forecast. Steve Mnuchin, the former Goldman Sachs banker who was recently confirmed as Trump's Treasury secretary, has been making the rounds talking up plans for a round of tax cuts. In the pr...