And there's simply no evidence that "uncertainty" about the path of policy in Washington, however you define it, hampered business investments, hiring, and especially market performance in the period between 2009 and 2016. Because "uncertainty" doesn't really mean uncertainty—it's just code used by supply-siders and right-wingers. What they really didn't like was the fact that a guy named Obama was sitting in the White House, poised to raise their taxes. (Readers, he did. And the economy and S&P 500 survived.)
Daniel Gross