Mark Cuban on Why He's All In for Kamala Harris

At one point, he supported the presidential aspirations of Donald Trump, a fellow reality TV star and businessman.

But now Mark Cuban — perhaps best known for his longtime ownership of the Dallas Mavericks and his perch as a “Shark Tank” shark — has taken on a surprising new role.

He is a prolific and vocal supporter of Kamala Harris. Especially when it comes to his view of what a Harris administration would mean for the economy.

So, today on The Run-Up, as we enter the homestretch toward Election Day, as Tim Walz and JD Vance are set to face off in what could be the final debate before people head to the polls, a conversation with Kamala Harris’s most surprising surrogate.

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