Lawyers for special counsel Robert S. Mueller III, who is investigating Russian meddling in the 2016 election, have issued subpoenas to several prominent Washington lobbying firms as the probe examines the finances of two former Trump campaign advisers, according to people with knowledge of the requests.
The subpoenas asked the firms to answer questions and provide records regarding their interactions with the consulting firms led by Michael Flynn, a former national security adviser to President Trump, and Paul Manafort, former chairman of the Trump presidential campaign, these people said.
