Sen. Dianne Feinstein, D-Calif., has asked two officials with the Trump campaign to testify before the Senate Judiciary Committee as part of the committee’s ongoing probe into Russian meddling in the 2016 election.

Feinstein, the top Democrat on the Judiciary Committee, sent letters to Dan Scavino and Brad Parscale on Wednesday asking them to turn over all documents related to hacked emails from Democratic officials by Russia, and their attempts to use social media to target voters.

Scavino oversaw social media for Trump’s presidential campaign and currently is the director of social media at the White House, and Parscale worked as the Trump campaign’s digital director. She also asked both to testify, and said in her letter to Parscale that the committee wants to know how Russia decided to target its ads.

"As you know, the U.S. intelligence community has concluded that Russia interfered in the 2016 U.S. election using a variety of tactics, including the extensive use of social media, online trolls, and internet propaganda," she wrote. "How Russia knew to target those ads is of interest to the committee."

Feinstein asked Scavino and Parscale to appear before the Judiciary Committee this month. She also asked Scavino for all documents related to former FBI Director James Comey’s contacts with Trump, as well as those related to his firing.

Feinstein said Scavino should hand over all communications related to stories published about the Russia probe, as well as a January 2017 Washington Post article from David Ignatius, and records about Attorney General Jeff Sessions, special counsel Robert Mueller, the guilty pleas from former national security adviser Michael Flynn and George Papadopoulos, and the indictments of former Trump campaign chairman Paul Manafort and his business associate Rick Gates.

The Senate Judiciary Committee has been conducting its own investigation into Russian meddling in the 2016 election, but Feinstein and Sen. Chuck Grassley, R-Iowa, the committee chairman, have pursued different paths.