WASHINGTON — It's been a White House tradition for decades: a first-term president hosts his immediate predecessor in the East Room for a ceremony to unveil the portrait of the former president that will hang in the halls of the White House for posterity.

 Republican presidents have done it for Democratic presidents, and vice versa — even when one of them ascended to the White House by defeating or sharply criticizing the other.

 "We may have our differences politically," President Barack Obama said when he hosted former President George W. Bush for his portrait unveiling in 2012, "but the presidency transcends those differences."

 Yet this modern ritual won't be taking place between Obama and President Donald Trump, according to people familiar with the matter. And if Trump wins a second term in November, it could be 2025 before Obama returns to the White House to see his portrait displayed among every U.S. president from George Washington to Bush.

Such a nice man and a fine example for young Americans. What happened to the rule we grew up with? .... It's just the right thing to do......