What other two roles has the president taken on over the years that are not mentioned in the constitution?

In addition to the roles explicitly outlined in the Constitution, the president has taken on the roles of party leader and chief economic planner. As party leader, the president influences party policy, campaigns for party candidates, and helps shape the party's platform. As chief economic planner, the president plays a significant role in formulating economic policies, proposing budgets, and addressing economic challenges, often collaborating with Congress and economic advisors.