House Democrats are gearing up for what’s likely to be their first subpoena fight with the Trump administration — targeting the Treasury Department’s decision to lift sanctions on companies tied to a billionaire Russian oligarch.

The chairs of the Financial Services, Intelligence and Foreign Affairs committees sent a joint document request to the department this week, and lawmakers are already anticipating they’ll have to issue a subpoena to get their hands on information about Treasury’s controversial move boosting Kremlin ally Oleg Deripaska.

Newly empowered Democrats are expected to fire off subpoenas on a host of fronts if administration officials try to stonewall their investigations.

And a senior Democratic lawmaker on one of those committees, who was not authorized to discuss internal deliberations, said the demands of Treasury would likely be the first subpoena the House issues in the 116th Congress — offering Washington a preview of the oversight battles to come and underscoring the scrutiny Democrats are placing on all things Russia.