What worries Mason about the presidency as established by the Constitution?

Mason was concerned that the presidency, as established by the Constitution, concentrated too much power in one individual, which could lead to tyranny. He feared that the lack of sufficient checks and balances might allow a president to overreach their authority. Additionally, he worried that the potential for re-election could incentivize presidents to prioritize personal ambition over the public good. Overall, Mason believed that the framework did not adequately safeguard against the abuse of executive power.