What is the most valuable data point to watch heading into the 2024 presidential election? This week on the 538 Politics podcast, we interviewed more than a dozen experts — pollsters, political scientists, data journalists — and asked them this one question. Their combined answers paint a picture of which variables will most influence the election this November. Galen and his guests cover voters' shifting perceptions of the two candidates, issues and key demographics that could make or break them, and the importance of "double haters," voters who have negative opinions of both President Joe Biden and former President Donald Trump.