Mavs owner Mark Cuban used twitter to voice his displeasure with the officiating during Dallas’ 128-120 loss to the Warriors on Friday.

Cuban, who wasn’t with the team at Oracle Arena, took offense to a travel called on Mavs rookie center Salah Mejri by 28-year NBA official Derrick Stafford.

But that wasn’t the end of it. Later in the game, Cuban took to twitter after Anderson Varejao appeared to elbow Dwight Powell in the neck and no call was made.

Cuban went on to complain that the NBA’s referee management team is being influenced by “politicians.”