Lawmakers may mandate a specific strategy for countering Russian disinformation if the State Department does not, a senior House Democrat warned.

“I urge you to come up with a strategy and work with Congress to implement it at once,” New York Rep. Eliot Engel, the top Democrat on the Foreign Affairs Committee, wrote to Secretary of State Rex Tillerson. “Otherwise, the House and Senate will look for legislative alternatives to direct the administration to treat the threats of Russia and ISIS with the seriousness they deserve.”