CNN's Acosta spars with Trump Jr. over border wall: 'Bye bye'

CNN's Jim Acosta and Donald Trump Jr.Donald (Don) John TrumpOn The Money: Liberal groups pressure Dems over Trump's tax returns | Top Trump economist says tax cuts powering economy | Trump Jr. slams Theresa May over Brexit delay | Watchdog warns of 'rosy' assumptions in Trump budget Trump Jr. slams Brexit delay: 'Theresa May should have taken my father's advice' The Hill's Morning Report - Dems contemplate big election and court reforms 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?" 

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Acosta added the hashtag "#byebye," a reference to President TrumpDonald John TrumpTrump mocks wind power: 'When the wind doesn't blow, just turn off the television' Pentagon investigator probing whether acting chief boosted former employer Boeing Trump blasts McCain, bemoans not getting 'thank you' for funeral 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.

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."

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.