https://mobile.nytimes.com/2017/05/05/us/politics/senate-russia-trump-associates.html
WASHINGTON The Senate Intelligence Committee, seeking to accelerate its broad investigation into Russian meddling in the presidential election, has asked a number of high-profile Trump campaign associates to hand over emails and other records of communications and dealings with Russian officials and businesspeople.
Among those who said they had received the requests were Roger J. Stone, an informal adviser to President Trump, and Carter Page, a businessman and former foreign policy adviser to the Trump campaign. Paul Manafort, the former campaign chairman, and Michael T. Flynn, the former national security adviser, were also sent letters, said the officials with knowledge of the investigation. Representatives for both men declined to comment.
Recipients to list all the meetings they had with Russian officials or business people from June 16, 2015, through Jan. 20, 2017. It set a May 9 deadline for a response.
Then, by May 19, the committee requested that the recipients hand over records of all communications including emails, text messages and phone logs with Russian officials or business people from the same period. It also asks them for information on any of their financial or real estate holdings related to Russia and to list any meetings they know of between other Trump campaign associates and Russians.