A House panel Thursday approved legislation that would lift trade restrictions on Russia, though the prospects remained uncertain for passing the bill before the country joins the World Trade Organization next month. The House Ways and Means Committee overwhelmingly approved establishing permanent, normal trade relations with Russia in a voice vote, adding momentum to the race to win congressional approval before the August recess at the end of next week
A House panel Thursday approved legislation that would lift trade restrictions on Russia, though the prospects remained uncertain for passing the bill before the country joins the World Trade Organization next month.

The House Ways and Means Committee overwhelmingly approved establishing permanent, normal trade relations with Russia in a voice vote, adding momentum to the race to win congressional approval before the August recess at the end of next week.

But challenges remain, with a recent pushback by labor unions threatening to erode some Democratic support for a top priority of the White House. Lawmakers from both parties have also called for the House to add provisions like those already approved by the Senate Finance Committee that would punish Russian human-rights violators.

House Ways and Means Chairman Dave Camp (R., Mich.) said he is optimistic that Congress can pass the legislation before the recess, with the human-rights provisions to be incorporated by the House Rules Committee.

"We've got strong bipartisan support for this on both sides of the Capitol," said Mr. Camp.

Last week, the Senate panel unanimously approved legislation to repeal the Jackson-Vanik Amendment--a 1974 measure that prevents the U.S. from granting most-favored-nation status to countries that restrict emigration. The committee also included human-rights legislation named after Sergei Magnitsky, a Russian lawyer who died in prison after accusing Russian government officials of fraud, despite White House calls for a bill without such provisions and Russian warnings of retaliation.

However, no decisions have yet been made about whether to bring the measure up for a vote next week in the House, according to aides. In the Senate, aides have said it is doubtful whether its version of the legislation will be approved by the chamber before the recess.

Rep. Sander Levin (D., Mich.), the top Democrat on the Ways and Means Committee, urged House leaders to confirm that the human-rights measures will be added before bringing the trade bill to the House floor.

Demonstrating how broader geopolitical tensions with Russia are complicating the trade debate, he also called for Congress to "send a clear message" to Russia to help address increasing violence in Syria.

The two committee leaders said they planned to express their concerns about Russian support for Syria in the report they issue along with the trade bill.

But Mr. Levin moved to diffuse one key concern among some unions, which have called for legislation that would go further in holding Russia accountable to its WTO commitments than measures included in the Senate version. The United Steelworkers and Communications Workers of America have urged support for the stronger enforcement provisions, which would allow the House Ways and Means and Senate Finance committees to request the U.S. Trade Representative's office to take action on Russian trade violations.

Mr. Levin said he has received assurances from USTR that the committees already have the ability to request such action, and receive a timely response.

Tim Reif, USTR's general counsel, confirmed that the administration would respond within 60 days and decide whether to take action.

Other major labor groups, including the AFL-CIO and International Association of Machinists and Aerospace Workers, oppose the trade bill outright, arguing there is little reason to believe Moscow will comply with its obligations under the World Trade Organization once it joins the body next month.

Still, business groups that have lobbied hard for the trade bill remain optimistic, saying a strong vote in the Ways and Means Committee could create the momentum needed to get the bill through both chambers by the end of next week.