President Donald Trump declared in a Sunday afternoon tweet that he will officially order the U.S. Department of Justice to investigate alleged infiltration and surveillance of the 2016 Trump presidential campaign.

“I hereby demand, and will do so officially tomorrow, that the Department of Justice look into whether or not the FBI/DOJ infiltrated or surveilled the Trump Campaign for Political Purposes – and if any such demands or requests were made by people within the Obama Administration!” Trump tweeted.