Washington (CNN) President Donald Trump sarcastically congratulated America Thursday on the one-year anniversary of special counsel Robert Mueller's probe into Russian meddling in the 2016 election, maintaining that there was no collusion between his campaign and the Russians.

"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!"

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. The only Collusion was that done by Democrats who were unable to win an Election despite the spending of far more money! — Donald J. Trump (@realDonaldTrump) May 17, 2018

In a second tweet Thursday morning, Trump suggested there was an FBI informant embedded within his campaign. His tweet came after a "Fox & Friends" segment that referred to a report in The New York Times that said "at least one government informant" met with former campaign advisers Carter Page and George Papadopoulos.

"Wow, word seems to be coming out that the Obama FBI 'SPIED ON THE TRUMP CAMPAIGN WITH AN EMBEDDED 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!" he said.

Wow, word seems to be coming out that the Obama FBI "SPIED ON THE TRUMP CAMPAIGN WITH AN EMBEDDED 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! — Donald J. Trump (@realDonaldTrump) May 17, 2018

The President kept up his complaints about the investigation later Thursday morning, tweeting that "despite the disgusting, illegal and unwarranted Witch Hunt, we have had the most successful first 17 month Administration in U.S. history - by far!

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