When Joe Biden selected Kamala Harris as his running mate, it was a historic moment — and one that made some people thousands of dollars. Traders on the website PredictIt, a stock market for politics, wager thousands of dollars on an array of political moments. Today on Nerdcast, Zach Montellaro tells Scott Bland about his conversations with political traders — one who trades semi-professionally and two who are looking to avenge their losses from the 2016 election.

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