The Republicans said this is despite the State Department's pledge to produce 5,000 new pages of documents.
A spokesman for Rep. Trey Gowdy of South Carolina said Tuesday that "nothing has changed" since Gowdy balked Saturday at an announcement by Clinton's presidential campaign that she would testify Oct. 22 before the panel. Gowdy chairs the special committee.
Clinton's campaign and House Republicans have sparred for months over her possible testimony and her refusal to turn over a private email server she used as secretary of state.
Speaker John Boehner said Tuesday that Clinton should "come clean" and turn the server over to the State Department's inspector general.