Rep. Kyrsten Sinema is officially a Democratic candidate for U.S. Senate.

She filed more than 10,000 signatures on Tuesday to get on the ballot to fill the seat being vacated by retiring Republican Sen. Jeff Flake.

Sinema is front-runner for the Democratic nomination. She represents Arizona's ninth district in Congress, a district that includes Tempe and other parts of Maricopa County.

Fellow Democrat Deedra Abboud has also filed her signatures to be on the ballot and has been campaigning statewide since last year.

On the other side of the aisle, Republicans Joe Arpaio and Kelli Ward have also filed signatures. Republican Rep. Martha McSally is also expected to file signatures before the May 30 deadline.

Green Party candidate Eve Reyes-Aguirre has also filed signatures to qualify for the ballot.

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