Rep. Brad Sherman (D-Calif.) wants to shore up allegations that China may have executed 65,000 members of the banned Falun Gong spiritual movement to harvest their organs.
Russia wants to forge a bilateral agreement by the end of 2014, a top official said.
“All policy options, including sanctions, are on the table,” a State Dept. spokeswoman said.
Sen. John Rockefeller (D-W.Va.) urged his colleagues Wednesday to allow diplomatic efforts with Iran to go forward without the Senate passing any additional sanctions.
“If there is any chance at all that new sanctions right now might disrupt the agreement … why on earth would we risk that?” Rockefeller said on the Senate floor.
Advocates are pressing for an executive order to ease the flow of humanitarian aid overseas.
"Political repression is not the way to respond," a spokesman said.
Move is in response to reports that Islamic Front seized rebel headquarters.
A majority also believes that the final deal should allow Iran no enrichment.
Chairman of the Joint Chiefs Gen. Martin Dempsey said negotiations on the U.S.-Afghan security agreement are over, and the pact will not be changed.