Former President Obama’s White House photographer has emerged as a thorn in President Trump’s side, regularly jabbing the commander in chief with images meant to contrast the current and former administrations.

Pete Souza, who has a sizable following on social media, has taken to trolling Trump with images meant to undercut his White House.

On Wednesday, the photographer shared a photo of Obama meeting Pope Francis, following Trump’s own face-to-face with pontiff in the Vatican.

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Souza’s photo, with the caption “Mutual admiration, 2016,” has earned more than 45,000 likes since it was posted around 10 a.m.

Mutual admiration, 2016. A post shared by Pete Souza (@petesouza) on May 24, 2017 at 6:55am PDT

Trump and Francis differ on issues ranging from poverty to climate change, and their disagreements came to the surface during the 2016 election.

Wednesday’s post was not the first time Souza has used snapshots from the Obama era to needle Trump.

Souza earlier this month posted a photo including James Comey moments after the White House announced Trump’s firing of the FBI director.

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Every person in this photograph is a patriot. A post shared by Pete Souza (@petesouza) on May 9, 2017 at 2:58pm PDT

“Every person in this photograph is a patriot,” Souza posted on his Instagram page.

The photo includes Obama, Comey, former Director of National Intelligence James Clapper and Lisa Monaco, who served as Obama’s chief homeland security and counterterrorism adviser.

Souza earlier in May also marked the House GOP’s passage of their ObamaCare repeal-and-replace bill with a photo of Obama.

“Someone had sent a message that ended with ‘your mother would be so proud,’” Souza wrote of the March 22, 2010 photo.

Obama’s mother died of ovarian cancer, and according to Souza “spent her last days worrying whether insurance was going to cover some of the medical expenses because they might consider her cancer a pre-existing condition.”

Trump isn't the only member of his administration Souza has mocked. In March, he posted an image of Obama taking a photo from the inside of a microwave after White House counsel Kellyanne Conway suggested that "microwaves that turn into cameras" could have been used to spy on Trump's campaign.

Little, Brown and Company announced in April that it would publish a book from Souza, “Obama: An Intimate Portrait: The Historic Presidency in Photographs,” this November.

Souza told The New York Times he was selecting a final catalog of 300-plus photographs from a pool of roughly 10,000 images showing Obama “in all facets of life."