Eleven Senate Republicans split from the Trump administration Tuesday afternoon, backing an effort by Senate Minority Leader Charles E. Schumer to force a floor debate on sanctions on Russian firms.

Treasury Secretary Steven Mnuchin had appeared at Tuesday’s Senate GOP lunch to make the case for letting sanctions relief for three sanctioned Russian companies to go forward.

The resolution seeks to maintain Treasury’s sanctions for En+ Group plc, UC Rusal plc and JSC EuroSibEnergo. The three companies had been sanctioned because they were under the control of Oleg Deripaska, a sanctioned Russian oligarch.

But a little while later, the Senate voted 57-42 to consider the joint resolution led by Schumer, a New York Democrat, that would block the Trump administration from lifting sanctions against the firms.

Before the vote to proceed to the measure, senators rejected , 42-57, a motion to table the resolution at the behest of Majority Leader Mitch McConnell of Kentucky.