Trump calls for Mueller deputy to be blocked from testimony

President TrumpDonald John TrumpTrump pushes back on recent polling data, says internal numbers are 'strongest we've had so far' Illinois state lawmaker apologizes for photos depicting mock assassination of Trump Scaramucci assembling team of former Cabinet members to speak out against Trump MORE knocked the House Judiciary Committee late Tuesday for allowing one of former special counsel Robert MuellerRobert (Bob) Swan MuellerTrump calls for probe of Obama book deal Democrats express private disappointment with Mueller testimony Kellyanne Conway: 'I'd like to know' if Mueller read his own report MORE’s deputies to accompany him during his testimony Wednesday, saying he should not be able to appear for the hearing.

"Just got back only to hear of a last minute change allowing a Never Trumper attorney to help Robert Mueller with his testimony before Congress tomorrow. What a disgrace to our system. Never heard of this before," Trump tweeted.

"VERY UNFAIR, SHOULD NOT BE ALLOWED. A rigged Witch Hunt!" he added.

The Judiciary panel said earlier in the day it would permit Aaron Zebley to join Wednesday’s hearing as Mueller's counsel, a change announced less than 24 hours before the former special counsel's blockbuster testimony is set to begin.

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A Republican source told The Hill earlier Tuesday that Mueller had requested that Zebley join him.

Rep. Doug CollinsDouglas (Doug) Allen CollinsThe United States broken patent system is getting worse Democratic Women's Caucus calls for investigation into Epstein plea deal Activist groups push House Judiciary leaders to end mass phone data collection MORE (Ga.), the top Republican on the committee, criticized Judiciary Committee Chairman Jerrold NadlerJerrold (Jerry) Lewis NadlerGOP memo deflects some gun questions to 'violence from the left' House Democrats urge Trump to end deportations of Iraqis after diabetic man's death French officials call for investigation of Epstein 'links with France' MORE (D-N.Y.) over the move, asserting it would “jeopardize whether tomorrow's hearing complies with the rules of the House.”

Trump’s ire toward Zebley is likely sparked by the fact that he represented the IT aide who helped Hillary ClintonHillary Diane Rodham ClintonTop Sanders adviser: Warren isn't competing for 'same pool of voters' Anti-Trump vets join Steyer group in pressing Democrats to impeach Trump Republicans plot comeback in New Jersey MORE set up a private email server.

"His lawyer represented the “basement server guy” who got off free in the Crooked Hillary case. This should NOT be allowed," Trump said in a subsequent tweet.

Republicans first cast Zebley’s presence as an attempt to add a second witness to the hearing, which they said would run afoul of House rules.

“You don’t get to change the rules right before kickoff, especially after a 22 month, $30 million investigation,” tweeted Rep. Jim JordanJames (Jim) Daniel JordanDemocratic Women's Caucus calls for investigation into Epstein plea deal DOJ releases notes from official Bruce Ohr's Russia probe interviews CNN slams GOP for not appearing on network after mass shootings, conservatives fire back MORE (R-Ohio), a member of the Judiciary panel and a chief attack dog on behalf of the White House.

Zebley is not expected to testify and is instead expected to advise his former boss as he faces an avalanche of questions over his two-year probe into Russia's election meddling and obstruction of justice. Zebley worked closely with Mueller during the special counsel investigation and was chief of staff to Mueller during his time heading the FBI.

Mueller is scheduled to testify in back-to-back hearings before the House Judiciary and Intelligence committees beginning at 8:30 a.m.