CNN's Jim Acosta and Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE clashed on Thursday after the White House correspondent shared footage from the southern border that Trump Jr. seized on as evidence of the effectiveness of a border wall.

Trump Jr. joined in a chorus of conservatives who mockingly thanked Acosta for bolstering their argument that "walls work" in deterring illegal immigration. The president's oldest son chided Acosta for "creating one of the best self-own videos ever."

"It’s a little strange Don," Acosta responded. "You guys seem to be saying the current measures in place are working. Does that mean your dad should reopen the government and get federal employees back to work?"

It’s a little strange Don. You guys seem to be saying the current measures in place are working. Does that mean your dad should reopen the government and get federal employees back to work? #byebye https://t.co/UY0NMye8BO — Jim Acosta (@Acosta) January 10, 2019

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Acosta added the hashtag "#byebye," a reference to President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE's reported parting words as he stormed out of a meeting with congressional leaders on Wednesday.

Trump Jr. later shot back, doubling down that Acosta had proved existing barriers along the border were working.

"Replicate that across the border & we'll all be safer," Trump Jr. added, Acosta's "#ByeBye" hashtag.

I know this might be hard for you to comprehend Jimbo, but the reason why all of Twitter has been mocking you today is because you were at a part of the border WITH A WALL. So yes, of course it was working. Replicate that across the border & we’ll all be safer. #RealNews #ByeBye https://t.co/BtdJ3GcxSV — Donald Trump Jr. (@DonaldJTrumpJr) January 10, 2019

The president later piled on, sharing Acosta's video with the caption "Dear Diary..."

The White House and Acosta have had an acrimonious relationship, with officials regularly trading barbs with the reporter. Acosta's press pass was briefly suspended last year following a heated presidential press conference, a move that drew widespread outcry.

Acosta traveled to McAllen, Texas, on Thursday to report on the president's visit to the southern border. Trump made the trip to drum up support for his proposed border wall, which is at the heart of a prolonged government shutdown that has forced hundreds of thousands of federal workers to go without pay.

The CNN correspondent posted photos and video of areas along the border that contained a steel-slat barrier, chain-link fence and razor-wire, as well as some spots with no physical barrier. Acosta reported there was "no sign of the national emergency that the president's been talking about."

I found some steel slats down on the border. But I don’t see anything resembling a national emergency situation.. at least not in the McAllen TX area of the border where Trump will be today. pic.twitter.com/KRoLdszLUu — Jim Acosta (@Acosta) January 10, 2019

The president has argued a border wall is necessary to address a humanitarian and security crisis at the border, and to stop an influx of crime and drugs. Democrats have argued there the wall would be an ineffective and costly deterrent.

Trump has pledged to declare a national emergency to construct the wall if he is unable to broker a deal to fund the wall, a measure that would face legal challenges.

— Updated 8:26 p.m.