But first it will try to answer two questions: how did public-sector unions become so powerful?

不过首先要试着回答两个问题：他们是如何变得如此强大的？

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And Obama got the support of some powerful labor unions, which meant their members were likely to vote for him.

同时，奥巴马也得到了一些强有力的劳工组织的支持，这意味着他们的组织成员很有可能投奥巴马的票。

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And Obama got the support of some powerful labor unions, which meant their members were likely to vote for him.

同时，奥巴马也得到了一些强有力的劳工组织的支持，这意味着他们的组织成员很有可能投奥巴马的票。

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