The American system of government

For most of its history, political moderates in the American system of government had a large impact upon the shaping of public policy. However, during the Trump presidency. the era of political moderation in both major parties seems to have evaporated. Why do you think that is the case? Under what circumstances, if any, can political moderates take back power from the extremists in both parties?
Use three or more scholarly and non- scholarly sources and more than three citations within the body of the paragraph.