'A smoking gun': Economist says Walmart feud reveals truth behind Trump's economic plan

U.S. President Donald Trump talks with Wal-Mart CEO Doug McMillon (L) and BlackRock CEO Larry Fink (R) as he hosts a strategy and policy forum with chief executives of major U.S. companies at the White House in Washington, U.S. February 3, 2017. REUTERS/Kevin Lamarque