Senator Roger Marshall (R-KS) has demanded that ABC News disclose any communications with Vice President Kamala Harris's campaign prior to the recent presidential debate, alleging a biased agenda against former President Trump. The debate, moderated by ABC's David Muir and Linsey Davis, featured multiple fact-checks of Trump while Harris went unchecked, prompting accusations of unfair treatment. Marshall's letter also references donations made by Dana Walden, ABC's parent company's co-chair, to Harris's campaigns, raising concerns about potential coordination. Senator Tom Cotton (R-AR) criticized ABC for failing to fact-check Harris's erroneous claim regarding U.S. troops, suggesting the network acted as a mouthpiece for the Harris campaign. The controversy has led to calls for transparency from ABC News, although the network has not publicly responded to the allegations. Trump's allies have also accused Harris of receiving debate questions in advance, intensifying the scrutiny of the debate's conduct.