A lawyer for the Sanders campaign sent a letter to senior party officials Friday seeking the removal of Connecticut Gov. Dannel Malloy and former Rep. Barney Frank (D-Mass.) as co-chairs of the platform and rules committees.

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“Gov. Malloy and Mr. Frank have both been aggressive attack surrogates for the Clinton campaign,” Brad Deutsch, legal counsel for the Sanders campaign, wrote in a letter to Jim Roosevelt and Lorraine Miller, the co-chairs of the convention’s Rules and Bylaws Committee.

“Their criticisms of Senator Sanders have gone beyond the dispassionate ideological disagreement and have exposed a deeper professional, political and personal hostility toward the Senator and his Campaign,” he wrote.

“The chairs therefore cannot be relied upon to perform their convention duties fairly and capably while laboring under such deeply held bias.”

Leigh Appleby, a Connecticut Democratic Party spokesman, told The Connecticut Post : “Nothing here has changed.”

The DNC refused the request in a letter to Deutsch Saturday.

Malloy, the co-chair of the platform committee, incensed Sanders and his supporters by linking the candidate to a mass shooting at a predominantly African-American church in South Carolina last year by pointing to his votes while in the House against a bill that would have extended the period for performing background checks.

The shooter, Dylann Roof, should not have been allowed to purchase the weapon, but a background check failed to turn up any red flags in the shorter three-day waiting period now on the books.

“Governor Malloy has unfairly ascribed blame for the national gun control laws single-handedly to Senator Sanders, referring to the three-day wait provision of the Brady Bill as the ‘Charleston-Sanders loophole,’” Deutsch wrote.

“Malloy has even ventured that Senator Sanders should be ‘held accountable’ for the ‘death and destruction’ caused by his ‘mistakes.’”

Malloy has also bashed Sanders for voting to shield gun manufacturers from legal liability.

"When the NRA called the bill [giving gun dealers and manufacturers immunity] that Sanders voted for the most important gun legislation in last 20 years, what they were saying was that it was the most important legislation that failed to make any of us safer, in fact, made us all in much greater danger," Malloy said in February, according to Daily Kos

That same month he tweeted: “It’s unconscionable to me that Bernie Sanders voted against the Brady Bill 5 times, & for the Charleston loophole.”

Sanders believes Frank is also too biased to serve as co-chair of the rules committee.

“After Sen. Sanders won the New Hampshire Democratic presidential primaries in February, Mr. Frank wrote an opinion piece in which he professed his ‘resentment’ toward the Senator. And Mr. Frank’s invective against Sen. Sanders has only intensified as Sen. Sanders has notched additional primary victories,” Deutsch wrote.

In April, Frank, the former chairman of the House Financial Services Committee and co-author of the 2010 Dodd-Frank Wall Street Reform Act, accused Sanders of McCarthyite tactics, a reference to the red-baiting Republican senator from Wisconsin who unleashed a wave of wrongful prosecutions in the 1950s.

“The thing that bothered me in that interview and elsewhere in the campaign is a kind of McCarthyite suggestion that the reason big banks and other institutions haven’t been criminally prosecuted is in part because people have taken financial contributions,” he said on MSNBC.

In a March interview, Frank called Sanders “outrageously McCarthyite,” Deutsch noted in his letter.

— Updated at 2:35 p.m.