The document discusses how political rhetoric has changed in the era of social media. It notes that Barack Obama's 2008 campaign made creative use of technologies like the internet and polling to gather real-time data. However, a personalized speech market can increase social fragmentation and spread misinformation. Politicians now seek to establish audiences and compete for attention through increasingly dramatic messaging. Unmediated populist nationalism has become tailor-made for social media, as seen with movements like Brexit and leaders like Donald Trump who skillfully use platforms like Twitter and Facebook. Group polarization on social media also contributes to the erosion of credible information and trust in politics.