The downfall of retired Gen David Petraeus,once America's most prominent post-9/11 mihitary leader,has stunned(①) a nation.Why does the US hold its top military commanders in such high esteem-and what are the consequences? America's 12th president was so apolitical(②) that before he ran for the job in 1848 he had never voted. But Zachary Taylor had been a successful general during the US-Mexican War.That was enough to take the Whig Party(③) nomination-and win the White House.
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