Final answer:
The threat of a presidential veto is an important tool for influence and persuasion over Congress, making the answer True. Furthermore, colonial governors had veto power, and President Bush was not a proponent of liberal internationalism. The necessary and proper clause has expanded, not limited, national government power.
Step-by-step explanation:
The threat of a veto is indeed an important tool for presidential persuasion, and the statement is True. The veto power allows the President to block legislation they oppose, and its mere threat can influence Congress to modify legislation to be more in line with the President's preferences. This dynamic emphasizes the presidential power to persuade as outlined by political scientist Richard Neustadt. Notably though, the veto can be a double-edged sword, as it can provoke political backlash or become ineffective if overused or if Congress simply doesn't pass any reform to be threatened with a veto, as was the case with President Clinton's health-care reform attempt.
Answer to Exercise 6.1.3: Colonial governors did possess the right to veto legislation passed by the colonial assemblies, making the statement True.
Answer to Exercise 13: President George W. Bush was not a proponent of liberal internationalism, which seeks to spread democracy and human rights through global cooperation and institutions. His foreign policy was more in line with unilateralism and pre-emptive actions, particularly evidenced by the wars in Iraq and Afghanistan. Therefore, the statement is False.
The necessary and proper clause has actually expanded the power of the national government by providing Congress the authority to pass laws deemed necessary and proper to execute its enumerated powers. It has not limited the national government; hence, the correct answer to Exercise 9.3.1 is False.