It's because it contradicted his political ideologies and campaign promises.(A)
Answer:
where? please, complete your question so that i can help ^-^
During the early years of the Cold War, West Berlin was a geographical loophole through which thousands of East Germans fled to the democratic West. In response, the Communist East German authorities built a wall that totally encircled West Berlin. It was thrown up overnight, on 13 August 1961.
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