Donald Trump Jr. called out CEO Jack Dorsey Wednesday over the “shadow ban on Twitter of conservatives” and labeled it a “flagrant attack” on Republican leaders.

“So now @twitter is censoring @GOPChairwoman? Enough is enough with this crap. @Jack it’s time for you to #StopTheBias against conservatives and Trump supporters and fix this once and for all,” Trump Jr., tweeted along with a link to a Vice article titled “Twitter is ‘shadow banning’ prominent Republicans like the RNC chair and Trump Jr.’s spokesman.”

So now @twitter is censoring @GOPChairwoman? Enough is enough with this crap. @Jack it’s time for you to #StopTheBias against conservatives and Trump supporters and fix this once and for all. https://t.co/JC6i6y01Ek — Donald Trump Jr. (@DonaldJTrumpJr) July 25, 2018

A short time later, he posted the tweet on Instagram and said the “shadow ban” wasn’t just a “crack down on some fringe accounts, but a “flagrant attack on mainstream conservatives.”

A post shared by Donald Trump Jr. (@donaldjtrumpjr) on Jul 25, 2018 at 4:30pm PDT

“This is my commentary to an article from @vice, yup even Vice did an article about the shadow ban on @twitter of conservatives. Go read it,” the first son wrote. “It doesn’t get more liberal than Vice and even they see it. This isn’t a crack down on some fringe accounts but a flagrant attack on mainstream conservatives and Republican leaders. This crap has to stop. #enough.”