Victor Davis Hanson of National Review Online takes note of former President Barack Obama’s response to his successor’s administration.

Obama’s charges are paradoxical. On one hand, Obama seems to believe that he, rather than Trump, should be credited with the current economic boom and the emergence of the United States as the world’s largest energy producer. But Obama also has charged that Trump’s policies are pernicious and failing.

Apparently, Obama believes that all of Trump’s successes are due to Obama, and all of Trump’s setbacks are his own.

Obama certainly forgets the old rule: Presidents, fairly or not, get both credit and blame for everything that happens on their watch, from Day One to the last hour of their tenures — even when wars abroad, technological breakthroughs, natural disasters, and market collapses have nothing to do with their governance.

Trump ran on the promise of a “Make America Great Again” economic renaissance. He pledged massive deregulation, fair rather than free trade, and tax reform and reduction. …

… Still, after 22 months, no one knows what the final verdict will be on the Trump administration. So it seems wise to wait until Trump’s four-year term is over before weighing in on his legacy or lack of one.

By the same token, the frenetic Obama should take a deep breath, stop arguing the past, and allow history to adjudicate his own eight-year economic and foreign-policy record.

Given that Obama was a strong progressive while Trump surprisingly has proven to be a hard-right conservative, their presidencies offer a sort of laboratory of contrasting worldviews.