Both Democratic and Republican lawmakers are criticizing stock trading app Robinhood’s Thursday decision to block users from buying or trading stocks popular on a Reddit forum, including GameStop, AMC and BlackBerry.

The decision followed efforts by users on the r/WallStreetBets forum to drive up prices of stocks that had been shorted by traditional hedge funds.

In one tweet, Sen. Ted Cruz (R-Texas) included a questioning face emoji along with a 2016 screenshot of a tweet from Robinhood that read, “Let the people trade.”

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Cruz next to this screenshot included the company’s Thursday announcement that “in light of current market volatility, we are restricting transactions for certain securities to position closing only,” including the stocks for GameStop and AMC.

Democratic Rep. Alexandria Ocasio-Cortez (N.Y.) also took to Twitter to vocalize her concern, writing that Robinhood’s decision was “unacceptable.”

“We now need to know more about @RobinhoodApp’s decision to block retail investors from purchasing stock while hedge funds are freely able to trade the stock as they see fit,” the progressive congresswoman added.

Read more at The Hill.