executive branches culminated in the escalation of the U.S. commitment in Vietnam, paving the way for the passage of the War Powers Act in 1973. It evokes a more flexible conception of the congressional role in foreign policy, focused on three facets of legislative power: the use of spending measures; the internal workings of a Congress increasingly dominated by subcommittees; and the ability of individual legislators to affect foreign affairs by changing the way that policymakers and the public consider international questions.

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