Professor Colin Dueck argues in Hard Line that dedication to a strong national defense is the most enduring theme of conservative and Republican foreign policy since World War II.
HOLMES: Why defense matters to conservatives →
But he said the Cold War seemed to settle that issue, and from the 1960s through the 1980s, mainstream Republicans accepted the need for U.S. engagement to fight communism.
Times poll shows GOP schism on interventionism →
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