MAD DUCK: With days left in office, President Obama ushers in dozens of policies.

In the final days before President Obama leaves office, administration officials are rushing to complete dozens of tasks that will affect millions of lives and solidify the president’s imprint on history. But in many cases, their permanence is uncertain, and President-elect Donald Trump is already pledging to undo some of them after taking office.

“He is clearly using executive power aggressively and trying to do as much as possible in his final days,” Princeton University history and public affairs professor Julian Zelizer said in an email. “It is clear that a president who was once reluctant to use the power of his own office has changed his heart, especially now that he sees a radically conservative Congress and Republican president-elect are getting ready to dismantle much of what he has done.”

President Pen-and-Phone was reluctant?

And which is more radical: A popularly elected Congress passing bills for a president’s signature in a constitutional manner, or an outgoing executive during his last hours in office acting as a sort-of one-man autopen machine?