President Donald Trump took to Twitter on Thursday morning to call out Barack Obama for having his Department of Justice spy on his presidential campaign with a confidential informant.

“Wow, word seems to be coming out that the Obama FBI ‘SPIED ON THE TRUMP CAMPAIGN WITH AN IMBEDDED INFORMANT.’ Andrew McCarthy says, ‘There’s probably no doubt that they had at least one confidential informant in the campaign.’ If so, this is bigger than Watergate!” Trump tweeted, according to The Daily Caller.

“There is probably no doubt that they had at least one confidential informant in the campaign,” former prosecutor and columnist Andrew McCarthy said while appearing on Fox & Friends this morning. “What happened here is they did not have a criminal predicate to open an investigation on trump as they had an immense predicate to conduct on president Clinton. They used powers covertly to investigate the trump campaign during the stretch run of the campaign under circumstances where they did not have evidence that anyone had actually committed a crime.”

McCarthy was referring to a New York Times article that “at least one government informant met several times with Mr. Page and Mr. Papadopoulos,” who were both advisory members of the Trump campaign.

Trump also took to Twitter today to call out White House Special Counsel Robert Mueller on the one year anniversary of the start of his investigation into the president’s supposed collusion with Russia during the election.

“Congratulations America, we are now into the second year of the greatest Witch Hunt in American History… and there is still No Collusion and No Obstruction,” Trump tweeted. “The only Collusion was that done by Democrats who were unable to win an Election despite the spending of far more money!”

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