Over objections from conservatives, the Senate voted to end debate on a measure to add language reauthorizing the bank’s charter to federal highway spending legislation. A vote to formally add the language to the highway bill will come later this week.

The measure extending the bank’s charter for five years was offered by Sen. Mark Kirk (Ill.), one of the most vulnerable Senate Republicans up for reelection next year.

House conservatives oppose reauthorizing the bank and House Republicans have also raised objections to the five-year highway spending bill, meaning the legislation faces an uncertain future in the House.