"I have noticed that Junior here has a habit of posting nonsense about me whenever the Mueller investigation heats up", the 29-year-old tweeted.
Congresswoman-elect Alexandria Ocasio-Cortez has been an advocate of raising the minimum wage nationwide.
Friday after he mocked her in an Instagram post that suggested the Democratic socialist ideology she espouses would lead to Americans eating their dogs.
'Congress as a body, GOP included, has the power.
He also added, "funny cuz it's true!"
Critics of Ocasio-Cortez's tweet - like Trump Jr.'s girlfriend, Kimberly Guilfoyle - jumped on her for making what they characterized as a threat of punitive government action in response to criticism.
Captioning the meme, Trump Jr. wrote: "It's amusing cuz it's true!"
Ocasio-Cortez may have walked back her remarks to avoid an ethics complaint early in her tenure.
"Members... are not to take or withhold any official action on the basis of the campaign contributions or support of the involved individuals, or their partisan affiliation". She came to the realization when she visited a diner in Washington, D.C. for a late night dinner and most of the staff were Capitol Hill workers at their second job.
A source close to Trump Jr. told Breitbart News that they expect an ethics complaint to be filed against Ocasio-Cortez.
On Thursday - the same day Don Jr. posted the meme - a NY judge ordered special counsel Robert Mueller, who is overseeing the investigation into Russian interference during the 2016 presidential election, to turn over a sentencing memo for the president's former lawyer and fixer, Michael Cohen, who has been cooperating with Mueller's investigation, on Friday.