Some Democrats, including several U.S. senators who are seeking the party's 2020 presidential nomination, warned that party leaders were playing into Republicans' hands and had stymied legitimate debate over U.S.-Israel policy.
The House, which is controlled by Democrats, approved the resolution condemning anti-Semitism, anti-Muslim discrimination and other forms of bigotry by a 407-to-23 vote.
The vote came less than a week after Representative Ilhan Omar, one of the two first Muslim women elected to Congress, made statements at a Washington event that were denounced by some as anti-Semitic.
The resolution does not mention Omar by name. But Republicans have seized on Omar's statements and the resulting intra-party conflict as a sign the Democratic Party is fractured.
Many Democrats, in turn, have said House leaders were cowed by a Republican effort to divert attention from bigotry within their own ranks and that Omar is being held to a different standard.