"The Committee’s investigation uncovered that foreign actors might be taking advantage of ActBlue’s inadequate security protocols," he added. "To ensure that foreign money is not being laundered through ActBlue, we are requesting a series of documents and communications related to their donor security and verification policies."
ActBlue has collected over $1.5 billion in donations from about 7 million donors. The portal's organizers issued a brief response to the subpoena Thursday.