Peter Hasson of the Daily Caller explains how former President Barack Obama is violating a time-honored tradition.

Abandoning the precedent set by previous presidents, former President Barack Obama has consistently undermined his successor’s policy agenda and has spoken out against virtually all of the major pillars of President Donald Trump’s domestic policy agenda.

Again and again, Obama has publicly undermined Trump’s signature policy plans, on issues ranging from Trump’s proposed border wall to the Republican attempts to repeal and replace Obamacare.

Obama’s repeated public opposition to Trump stands in stark contrast to the example set by former President George W. Bush, who remained on the sideline during the Obama years. “I don’t think it’s good for the country to have a former president undermine a current president,” Bush explained in 2014.

Obama’s inner circle said during the transition that the former president wanted to extend that same courtesy to President Trump. “We now are going to want to do everything we can to help you succeed, because if you succeed, then the country succeeds,” Obama said to Trump in front of reporters following the election.

It didn’t last long.