Ex-White House photographer Pete Souza had one question on Instagram Tuesday for President Donald Trump, who has reportedly moved former President Barack Obama’s presidential portrait to a less visible spot in the White House: “Petty or racist?”

CNN reported Sunday that the president had ordered his staff to move the portrait to the top of the Grand Staircase. The outlet cited two sources familiar with the matter, and even reviewed a photo showing the painting hanging in its new, far-less-prominent home.

Souza has cheekily shaded Trump before, but appeared earnestly troubled by this news. The former chief official White House photographer, who served during both Obama’s and President Ronald Reagan’s administrations, explained his frustrations in a lengthy post.

“There is a longstanding protocol/tradition where the portraits of former Presidents are hung,” Souza wrote Tuesday on Instagram. “The most recent ones are displayed in the Grand Foyer, then the Cross Hall, then the Grand Staircase, in that order.”

“They are all prominently displayed so visitors during the White House public tours would see the most recent Presidents,” he continued. “(Other portraits like Lincoln and Washington are displayed prominently in the State Dining Room and East Room).”