Final answer:
The shift in power from Congress to the executive branch was primarily influenced by the growth of the national bureaucracy, the increase in presidential power, and major events and crises in history.
Explanation:
The factors that contributed the most to the shift in power from Congress to the executive branch over matters of domestic policy were:
- The growth of the national bureaucracy: As new programs required bureaucrats to run them, the national bureaucracy expanded, giving the executive branch more influence.
- The increase in presidential power: The increasing complexity of the domestic economy and the rising profile of the United States on the international stage made the president a more significant figure as a leader, diplomat, and commander-in-chief.
- Major events and crises: Events like the Great Depression, World Wars, Cold War, and the war on terrorism further elevated the stature of the president.
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