It's a battle of political heavyweights as John McCain and Sandra Day O'Connor face off in the championship round of the Arizona History Showdown.
How it works: Click here to vote in the third round. Voting closes at 5pm.
We'll show you the results in Monday's Axios Phoenix.
Catch up quick: O'Connor bested her old ally Barry Goldwater in the showdown's Final Four, while McCain defeated fellow U.S. Sen. Carl Hayden.
Catch up quick: We combined the two 16-entry brackets we started with into one after the first round, but you can see the results of the first round of voting here.