A broad coalition, including the U.S. Chamber of Commerce, Hollywood, the recording industry and organized labor strongly back the bill.
But consumer groups and major Web companies, including Google, Yahoo and Facebook, warn that SOPA could stifle innovation and infringe upon free speech.
Opponents of the bill offered dozens of amendments to it last week, forcing the markup to drag on for two days.
Judiciary Committee Chairman Lamar Smith (R-Texas), SOPA’s sponsor, and his allies on the committee voted down the amendments, accusing the bill’s opponents of using stalling tactics and misrepresenting the legislation.
The committee is expected to approve the bill when it finally comes up for a vote.
Senate Majority Leader Harry ReidHarry Mason ReidHarry Reid calls on Democrats to plow forward on immigration Democrats brace for tough election year in Nevada The Memo: Biden's horizon is clouded by doubt MORE (D-Nev.) has moved to bring the Senate’s version of the bill, the Protect IP Act, to a vote in January.