Democrats in the Senate are planning a vote on the nomination of Patricia Ann Millett for a seat on the D.C. Circuit Court of Appeals.

Millett, who has has argued 32 cases before the U.S. Supreme Court, has extensive experience in Indian law. She recently won a decision on behalf of tribal interests in Arizona v. Inter Tribal Council of Arizona, a voting rights case.

Despite her achievements, Republicans plan to block the nomination. They say the D.C. Circuit doesn't need another judge even though there are three vacancies.

The D.C. Circuit has heard a number of high-profile Indian law cases, including the Cobell trust fund lawsuit, the Cherokee Freedmen dispute, the Patchak land-into-trust case and the San Manuel labor law case.

It is often seen as a stepping stone to the Supreme Court -- of the nine justices, four served on the D.C. Circuit.

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