As Trump claims the U.K. Labour Party is meddling in the U.S. election, CBS News takes stock of foreign agent political donations, and who's behind them.

Donald Trump's campaign has accused British Prime Minister Keir Starmer's Labour Party of "blatant foreign interference" in the U.S. presidential election after its volunteers travelled to the United States to help campaign for Kamala Harris.

The British Prime Minister's Labour Party was formally accused by Donald Trump’s presidential election campaign of breaking U.S. electoral law through “blatant foreign interference” in the race. The Republican campaign submitted a legal complaint to the Federal Electoral Commission accusing the “far-left Labour Party” of meddling via its plan to send volunteers out to campaign for Democratic rival Kamala Harris.