A veteran of the Watergate prosecution is now serving in a pivotal role in the Trump-Russia probe. Sources familiar with Bob Mueller’s investigation of Russian efforts to interfere in the 2016 election confirmed to The Daily Beast that James Quarles is the probe’s point person for dealing with the White House.

One source said Mueller himself is always “fully up to date on the White House portion” of the probe, and that Quarles handles the bulk of the day-to-day interactions between the White House and the special counsel. He communicates with the White House several times a week regarding Mueller’s queries, document requests, and planned interviews. As the probe progresses, the White House team’s communication with Quarles has become increasingly frequent.