WASHINGTON — Senator Elizabeth Warren of Massachusetts on Wednesday introduced legislation to revoke Medals of Honor from 20 United States soldiers who killed hundreds of Native American women and children in the Wounded Knee Massacre of 1890.

The proposal from Ms. Warren, a leading candidate for the Democratic presidential nomination, follows a House bill on the same subject that was introduced in June by Representative Denny Heck of Washington. It has yet to receive a vote.

“The horrifying acts of violence against hundreds of Lakota men, women and children at Wounded Knee should be condemned, not celebrated with Medals of Honor,” Ms. Warren said in a statement released Wednesday by her Senate office. “The Remove the Stain Act acknowledges a profoundly shameful event in U.S. history, and that’s why I’m joining my House colleagues in this effort to advance justice and take a step toward righting wrongs against Native peoples.”

Congress has rescinded more than 900 Medals of Honor since enacting legislation in 1916 to create a board of retired military officers to review previously awarded medals, according to Ms. Warren’s Senate office.