Final answer:
The false statement about the role of the president as chief diplomat is that Senate approval of treaties negotiated by the President is almost automatic.
Step-by-step explanation:
The false statement about the role of the president as chief diplomat is:
c. Senate approval of treaties negotiated by the President is almost automatic
In reality, the Senate plays a crucial role in approving treaties negotiated by the President. According to the Constitution, the President has the power to negotiate treaties with foreign governments, but they require a two-thirds vote of the Senate to be ratified. This checks and balances system ensures that the Senate has an active role in shaping the nation's foreign policy.