Funding source for legislative flyers crowding Denver mailboxes remains unknown

Residents of Denver have reported a surge of legislative campaign flyers in their mailboxes. The flyers are part of a coordinated effort to influence upcoming elections. Authorities have been unable to trace the financial backer of the distribution. The Denver Post notes that the anonymity makes accountability difficult. Voters are receiving multiple copies of the same political material. Mail carriers have expressed concerns about the volume of the flyers. Election officials say they will continue to investigate the source. The situation highlights challenges in tracking political advertising funding.