Sen. Dianne Feinstein on Friday asked the White House, social media companies, and entities associated with the Trump campaign for information related to the investigation into Russian meddling in the 2016 election.

Feinstein, the top Democrat on the Senate Judiciary Committee, sent letters to White House counsel Donald McGahn; Trump’s personal lawyer Michael Cohen; Twitter; Facebook; and Cambridge Analytica, the campaign’s data analytics firm, seeking information related to the Trump campaign’s ties to Russia, as well as Russia’s use of the social media platforms during the election.

The letters were released days after Feinstein and Sen. Chuck Grassley, R-Iowa, chairman of the Judiciary Committee, decided to pursue different paths related to the committee’s Russia probe. Grassley said he would be pursuing new allegations that the Obama administration knew that Russia was involved in shady activities in the U.S. energy market, but still approved the sale of a Canadian uranium mining company with assets in the U.S.

Grassley also said he would pursue news that Democrats and Hillary Clinton's campaign financed the so-called "Trump dossier," after saying they had nothing to do with the document that sought to undermine Trump's White House ambitions.

Feinstein said this week that she wants to look into President Trump’s firing of former FBI Director James Comey and whether the president obstructed justice. She also wants to continue investigating whether the Trump campaign colluded with Russia, a question at the center of special counsel Robert Mueller’s probe, as well as other investigations currently being conducted by other congressional committees.

In her letter to McGahn, Feinstein specifically asked for documents related to Trump’s interactions with Comey, as well as son-in-law Jared Kushner’s foreign contacts and records relating to a June 2016 meeting at Trump Tower that Donald Trump Jr. attended with a Russian lawyer, Natalia Veselnitskaya.

Feinstein asked Cohen in a letter to testify before the Senate Judiciary Committee and requested records related to his own contacts with Russians, as well as documents related to hacked emails from the Democratic National Committee and John Podesta, Hillary Clinton’s campaign chairman.

The Democratic senator also asked Cohen for records related to Russian meddling in the 2016 election and documents related to efforts to build a Trump Tower in Moscow.

From Twitter and Facebook, Feinstein is seeking information related to ads run on the platforms connected to Russian entities. Feinstein asked Twitter for direct messages sent to and from Trump campaign associates and accounts tied to the release of hacked emails, including WikiLeaks, WikiLeaks founder Julian Assange, and Guccifer 2.0.

Her fifth letter, sent to Cambridge Analytica, requests communications with Russian officials and documents related to efforts to obtain hacked emails from the DNC, Podesta, and Clinton.