Republican presidential candidate Donald TrumpDonald John TrumpAssange meets U.S. congressman, vows to prove Russia did not leak him documents A history lesson on the Confederacy for President Trump GOP senator: Trump hasn't 'changed much' since campaign MORE is spending Saturday campaigning in Arizona ahead of the state's critical primary on Tuesday. 

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His first rally in Phoenix, Ariz., is scheduled to begin at 1 p.m. Eastern. 

Watch the event live in the video above.