Senior leadership in the Congressional Black Caucus (CBC) sent a letter to Democratic National Committee (DNC) Chairman Tom Perez Thomas Edward PerezClinton’s top five vice presidential picks Government social programs: Triumph of hope over evidence Labor’s 'wasteful spending and mismanagement” at Workers’ Comp MORE days after the bungled Iowa caucuses, demanding he take accountability for the situation.

The letter was penned on Feb. 5 — two days after Iowa caucused — by four Democrats: CBC Chairwoman Rep. Karen Bass Karen Ruth BassPatients are dying unnecessarily from organ donation policy failures Hispanic caucus report takes stock of accomplishments with eye toward 2021 Bogeymen of the far left deserve a place in any Biden administration MORE (Calif.), CBC PAC Chairman Rep. Gregory Meeks Gregory Weldon MeeksBottom line Democrats go big on diversity with new House recruits Chamber of Commerce, banking industry groups call on Senate to pass corporate diversity bill MORE (N.Y.) and Reps. Barbara Lee Barbara Jean LeeSteph, Ayesha Curry to be recognized by the Congressional Hunger Center Democrats unveil plan declaring racism a public health issue With Biden, advocates sense momentum for lifting abortion funding ban MORE (Calif.) and Bennie Thompson Bennie Gordon ThompsonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers FBI director calls antifa 'a real thing' Democrats slam DHS chief for defying subpoena for testimony on worldwide threats MORE (Miss.), BuzzFeed News reports.

"As chairman of the Democratic National Committee, you bear some responsibility for what happened in Iowa and for the consequences," the lawmakers told Perez in the letter, adding that the "unacceptable" problems in the Hawkeye State “undermined public confidence” in the primary process.

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The results of the first-in-the-nation caucus were substantially delayed because of a technological failure that made it difficult for a timely and accurate tally of the results to happen.

Even after all precincts were reporting, The Associated Press said it was unable to declare a winner due to discrepancies in the reporting data.

Perez, who's been at the helm of the DNC for three years, responded to the group Tuesday with a letter of his own, according to BuzzFeed.

"What happened in Iowa was completely unacceptable,” Perez wrote back. “While the Iowa Democratic Party (IDP) runs the Iowa caucuses, we have a shared responsibility, which we take seriously.

“I look forward to meeting with you and your fellow members to address questions and concerns about the Iowa caucus process,” he added.

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Perez has never really been in the CBC's good graces; in 2018, after many in the caucus opposed a rule change concerning superdelegates, the CBC passed a vote of no confidence against him.

Late last week, Perez called for the IDP to recanvass the results. The IDP said Wednesday that it expects the recanvass to begin Sunday.

Wednesday evening, IDP Chairman Troy Price announced his resignation.