The US Senate voted unanimously on Thursday for an amendment to a budget bill that will ease Congress' ability to re-impose sanctions against Iran if it violates a nuclear deal.
Republican Senator Mark Kirk, of Illinois, who sponsored the amendment said on Twitter: "With 100-0 vote on my Iran sanctions amendment today, Senate is speaking in a clear and unified voice against Iranian regime."
The amendment will cover the cost of imposing sanctions if Iran breaks any existing or future nuclear agreement.
Kirk indicated that the passage of this amendment "signals the Senate's strong support for the Kirk-Menendez Iran sanctions bill, which stands ready now for a full Senate vote."
Kirk is deeply skeptical of international negotiations on Iran's nuclear program. He co-authored a bill that would tighten sanctions on Tehran, which President Barack Obama has threatened to veto as a threat to delicate international negotiations.
Senate Majority Leader Mitch McConnell said on Tuesday the senate would vote on Kirk's sanctions bill if international negotiators miss their deadline at the end of this month for reaching a framework nuclear agreement