Seven new Democratic chairmen of House committees demanded Tuesday that Treasury Secretary Steven Mnuchin hold off on the planned easing of sanctions against three companies tied to Russian billionaire Oleg Deripaska. “As the chairs of committees with oversight jurisdiction over the US response to Russia’s attempts to interfere in our elections and other hostile actions, we have a number of concerns about the agreement that the US has reached,” the Democrats wrote in a letter requesting a detailed response by Friday.