Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE blasted the Carrier union's president Wednesday after he said the president-elect "lied his ass off" about terms of the deal to keep Carrier manufacturing jobs in the United States.

"Chuck Jones, who is President of United Steelworkers 1999, has done a terrible job representing workers," Trump tweeted Wednesday. "No wonder companies flee country!"

Chuck Jones, who is President of United Steelworkers 1999, has done a terrible job representing workers. No wonder companies flee country! — Donald J. Trump (@realDonaldTrump) December 8, 2016

In a subsequent tweet, Trump slammed the union for not being able to keep the jobs in Indiana initially.

"If United Steelworkers 1999 was any good, they would have kept those jobs in Indiana. Spend more time working-less time talking. Reduce dues," Trump tweeted.

If United Steelworkers 1999 was any good, they would have kept those jobs in Indiana. Spend more time working-less time talking. Reduce dues — Donald J. Trump (@realDonaldTrump) December 8, 2016

Jones appeared on CNN just before Trump's tweet. He told CNN anchor Erin Burnett that Trump's comment "isn't very damn nice." He added it "must mean I'm doing a good job" and said Trump "doesn't like to be challenged."

chuck jones tells me this "isn't very damn nice" and it "must mean I'm doing a good job", trump "doesn't like to be challenged" https://t.co/iIRZsV0p1I — Erin Burnett (@ErinBurnett) December 8, 2016

Jones later on CNN criticized the president-elect for attacking him instead of admitting he got the numbers wrong.

"I think that's pretty low-down," he said.

"Does it bother me? Nah, hell no. I'm still going to be able to sleep tonight and life will go on tomorrow for me."

Jones said he thinks Trump sent out the tweet because the president-elect doesn't like to be challenged. He added though that attacking him "isn't the answer."

"I didn't attack him," Jones said. "I just called him out where I felt like that he misled the people."

Jones on Tuesday said he was optimistic when Trump first promised to save 1,350 jobs at Carrier's Indiana plant, The Washington Post reported.

The company had originally planned to move the jobs to Mexico, but decided to keep 730 of the jobs in Indianapolis after receiving $7 million in tax breaks from the state.

Jones told the Post on Tuesday he hoped Trump would explain at a Dec. 1 meeting that 550 of the Carrier jobs weren't saved.