Mark Penn, former adviser to Bill and Hillary Clinton, has called for an internal investigation into ABC News over allegations of bias during the recent presidential debate between Donald Trump and Kamala Harris. He criticized moderators David Muir and Linsey Davis for frequently interrupting Trump with fact-checks while allowing Harris to propagate falsehoods without challenge. Penn suggested that a review of internal communications at ABC is necessary to determine if there was a deliberate effort to favor Harris, stating, 'suspicion here is really quite high.' He emphasized the need for an independent party to investigate the debate's planning and execution. This controversy has sparked discussions about media integrity and the role of moderators in presidential debates, with Penn asserting that ABC did a disservice to American voters. Trump's campaign has already indicated he will not participate in further debates against Harris following what they deem a rigged format.