WASHINGTON (AP) — The Senate on Wednesday headed toward a vote on legislation that would end four-decade-old trade restrictions that are blocking U.S. businesses from enjoying the benefits of a more open Russian market.

The final vote on Thursday was expected to show overwhelming support for legislation that also imposes sanctions on Russian human rights violators.

The legislation was welcomed by American businesses concerned about falling behind in the race to win shares of the Russian market but drew rebukes from Russian officials over the human rights part of the bill.