Wisconsin Supreme Court Justice Pat Roggensack plans to submit the required signatures to get her name on the ballot for re-election next year.
Roggensack planned to deliver 4,000 signatures on Friday to the state elections board office. It takes at least 2,000 to get on the ballot for the April 2 election.
Two others have announced they intend to challenge Roggensack but they have not yet turned in their nomination papers. The signatures are due Wednesday.
Challenging Roggensack are Marquette University law professor Ed Fallone and Milwaukee lemon law attorney Vince Megna.
Roggensack is seeking a second 10-year term on the state's high court. If more than two candidates qualify for the ballot, there will be a Feb. 19 primary.