WBEZ brings you fact-based news and information. Sign up for our newsletters to stay up to date on the stories that matter.What does it mean to be a Republican today? The GOP’s presidential candidates are fighting to answer that question. This episode: Sam Sanders, campaign reporter; Domenico Montanaro, Washington desk editor; Mara Liasson, National Political Correspondent. Find the team on Twitter @nprpolitics and at npr.org/politics.