Donald Trump’s biggest challenge in 2017 will be getting anything done. For all his criticism of President Obama, Donald Trump shares many of his predecessor’s most self-defeating executive characteristics: a near-messianic belief in their personal ability to produce outcomes, dramatic under-estimation of the extent to which the American system of governance is designed to do nothing absent broad political cooperation, under-investment in Congressional relationships that translate policy into law, and deep reliance on a White House staff of campaign people.