(Bloomberg) -- The founder of the right-wing Oath Keepers militia and several of its members pleaded not guilty to “seditious conspiracy” for their roles in the January 2020 insurrection, signaling a drawn out fight over the most serious charges so far stemming from the assault on the Capitol.

Elmer Stewart Rhodes entered the plea Tuesday during a virtual hearing before U.S. District Judge Amit Mehta in Washington. Half a dozen other Oath Keepers members charged earlier this month also entered not-guilty pleas to charges alleging they conspired to violently prevent the certification of Joe Biden as president.

Read More: Oath Keepers Charged With Seditious Plot in Capitol Attack

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