As midterm elections approach, Republicans are not as confident about making as many gains in the House – or even taking back control of the Senate – as they used to be. CNN Political Director David Chalian explains why Democrats feel more optimism these days and what Republicans think is going to happen in November. As his poll numbers improve a bit, President Joe Biden is spending his Labor Day in two battleground states.To learn more about how CNN protects listener privacy, visit cnn.com/privacy