"Highly conflicted Bob Mueller & the 17 Angry Democrats are using this Phony issue to hurt us in the Midterms. No Collusion!" President Donald Trump tweeted. | Susan Walsh/AP Photo White House Trump launches first broadside at Mueller after Manafort plea deal

President Donald Trump on Saturday fired his first salvo against special counsel Robert Mueller since former Trump campaign chairman Paul Manafort entered a plea deal with the Russia probe's federal prosecutors.

"While my (our) poll numbers are good, with the Economy being the best ever, if it weren’t for the Rigged Russian Witch Hunt, they would be 25 points higher!" Trump tweeted. "Highly conflicted Bob Mueller & the 17 Angry Democrats are using this Phony issue to hurt us in the Midterms. No Collusion!"


Trump attorney Rudy Giuliani also broke his silence on Manafort's intended guilty plea earlier Saturday, alleging in a tweet that "sources close to" Manafort's defense team told the former New York mayor that the cooperation agreement "does not involve the Trump campaign" and that there was "no collusion with Russia" from within the Trump campaign.

Giuliani added: "Another road travelled by Mueller. Same conclusion: no evidence of collusion President did nothing wrong."

News of Manafort's plea deal came Friday, just days before the longtime GOP operative was due to appear in a Washington, D.C., courtroom to face charges of foreign lobbying and money laundering. Manafort was previously found guilty of eight counts of bank and tax fraud in a separate trial that took place in Virginia last month.

Friday’s plea agreement said Manafort "shall cooperate fully, truthfully, completely and forthrightly with the Government and other law enforcement authorities identified by the Government in any and all matters to which the Government deems the cooperation relevant.”

Trump's tweet Saturday also comes as the president is facing a slate of polls showing his popularity on the downswing weeks before the midterm elections.