Prediction markets like Kalshi and Polymarket officially don't care which side of a bet wins.There is no "house." They get their cut either way. It's a business model that's attracted billions of VC dollars.Yes, but: Kalshi and Polymarket should be pulling hard for Democrats in today's midterm elections. Even if that feels counterintuitive. Catch up quick: Prediction markets burst into the public consciousness two years ago, when their users correctly "picked" Donald Trump to beat Kamala Harris.