ActBlue, a major fundraising vehicle for Democratic candidates, faces scrutiny from a joint investigation by the House Administration, Oversight, and Judiciary committees. During questioning before these bodies, co-founder Matt DeBergalis declined to answer questions by asserting his Fifth Amendment right against self-incrimination in a closed-door deposition.

The investigation centres on allegations that the platform's fraud detection systems may have been inadequate, potentially allowing contributions from foreign sources in violation of campaign finance rules. His invocation of the Fifth has drawn reactions from Republican lawmakers, with some viewing it as an implicit acknowledgement of potential legal exposure.