WATCH LIVE: Trump holds Arizona rally with Turning Point USA and surprise guest

Former President Donald Trump is speaking at a Turning Point USA event in Glendale, Arizona , in his first rally since the close of the Democratic National Convention .

Trump is set to address supporters at 7 p.m. Eastern time at Desert Diamond Arena, where Vice President Kamala Harris held a similar event earlier this month. The Friday evening rally, which will be co-hosted by Turning Point PAC and Turning Point Action, comes as the two campaigns vie for voters in the battleground state. Trump holds a razor-thin lead in Arizona, according to recent poll averages.

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Rumors abound that Robert F. Kennedy Jr., who dropped his independent bid for the presidency Friday afternoon, will join Trump onstage in Glendale. Kennedy, who is President John F. Kennedy's nephew, endorsed Trump during his campaign exit. Speculation swirls he is Trump's anonymous "special guest" teased to make an appearance at the Arizona rally.

Turning Point USA was founded by activist Charlie Kirk to “equip and empower all generations to engage in grassroots activism and emerge as leaders in their communities.”