House Democrats held a conference call on Thursday afternoon to discuss ways they could protect special counsel Robert Mueller’s probe if the new acting attorney general tries to hamper the investigation, as many have speculated.

According to a participating lawmaker who spoke to the New York Times, the call was led by House Minority Leader Nancy Pelosi (D-CA), as well as other senior House Democrats: Reps. Jerrold Nadler (D-NY), Adam Schiff (D-CA) and Elijah Cummings (D-MD).

In the call, Democrats mulled crafting a resolution that could shield Mueller’s probe and also considered tacking language that would protect the probe onto the coming spending bill that Congress must pass before the end of the year, according to the Times.