President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE's attorney Rudy Giuliani on Wednesday called for special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE to "put up or shut up" as the president's legal team offers increasingly pointed criticism of the federal Russia probe.

"We believe that the [Mueller] investigation should be brought to a close," Giuliani told reporters. "We think they’re at the end of it. They should render their report."

"I mean, I guess if we were playing poker, we'd say 'put up or shut up,' " he continued. "What do you got?"

“We believe the investigation should be brought to a close … Put up or shut up,” President Trump’s attorney Rudy Giuliani says about the Russia investigation pic.twitter.com/ifiKybi01r — CNN Politics (@CNNPolitics) August 1, 2018

Trump on Wednesday morning called for Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsRoy Moore sues Alabama over COVID-19 restrictions GOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs MORE to shut down Mueller's investigation into possible ties between Trump campaign associates and Russia. The president issued the call on the second day of former Trump campaign chairman Paul Manafort Paul John ManafortOur Constitution is under attack by Attorney General William Barr Bannon trial date set in alleged border wall scam Conspicuous by their absence from the Republican Convention MORE's trial on bank and fraud charges in Virginia.

"This is a terrible situation and Attorney General Jeff Sessions should stop this Rigged Witch Hunt right now, before it continues to stain our country any further," Trump tweeted. "Bob Mueller is totally conflicted, and his 17 Angry Democrats that are doing his dirty work are a disgrace to USA!"

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Trump has frequently decried Mueller's probe as a "witch hunt" and called its authenticity into question, but his demand that Sessions end the investigation "now" marks another escalation of his attacks against the special counsel.

Giuliani on Wednesday also repeated the claim that Mueller's investigation was started by controversial FBI counterintelligence agent Peter Strzok, despite the Mueller probe launching after Trump fired former FBI Director James Comey James Brien ComeySteele Dossier sub-source was subject of FBI counterintelligence probe Judge will not dismiss McCabe's case against DOJ Democrats fear Russia interference could spoil bid to retake Senate MORE.

"We have every reason to believe they don’t have anything," Giuliani said Wednesday. "I don’t think they have any evidence he did anything wrong."

Mueller so far has indicted or secured guilty pleas from 32 individuals, including four former Trump aides.