Senator Obama also had praise for his rival.

奥巴马参议员也赞扬了他的对手。

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When they stand side by side, people notice that Mr Obama towers over his rival.

当站在一起的时候，人们会觉得奥巴马会压倒他的对手似的。

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Obama had trouble winning working class support in his primary battles with former rival Hillary Clinton, but pollster Clay Richards says he appears to be making some inroads.

奥巴马与前竞争对手希拉里·克林顿进行初选之战时，他很难获得工薪阶层的支持，但民意测验专家Clay Richards说，奥巴马在这方面已经有所改善。

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John McCain, the presumptive Republican nominee and Obama's rival in the general election.

CNN: Clinton endorses Obama, calls for party unity

John McCain, Mr Obama's rival for the presidency, wants to suspend America's relatively paltry tax on petrol, to secure lower prices for angry drivers.

ECONOMIST: Oil prices

Obama congratulated his rival John McCain and praised McCain's service to the country as a politician and Navy pilot and prisoner of war in Vietnam.

CNN: 'Change has come to America,' Obama says