He conducted a negative campaign against his opponent.

他对他的对手进行了负面打击。

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All of these voters say they are glad that the barrage of mainly negative campaign ads will finally come to an end today. Craig Windham, NPR News, Arlington, Virginia.

这些选民说，他们很高兴狂轰乱炸式的选举抹黑广告今天就要停播了。N PR新闻，克雷格·温德姆弗吉尼亚州阿灵顿市报道。

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Such hijacked media are the opposite of earned media: an asset or campaign becomes hostage to consumers, other stakeholders, or activists who make negative allegations about a brand or product.

这种劫持式媒体恰恰与免费媒体报道相反：某项资产或活动沦为了对某个品牌或产品发表负面言论的消费者、其他利益相关者或激进分子的“人质”。

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But when Doug Forrester put her comments in a television ad, that seemed to push the negative campaign too far.

NPR: Democrat Corzine Manages Jump from Senator to Governor

Representative CONRAD BURNS (Republican, Montana): Baseless allegations drummed up in a negative campaign that started almost a year and a half ago.

NPR: A Year of Ethics Lapses in Congress

Mr. Romney's largely negative campaign was able to demolish Mr. Gingrich, but it is also hurting his own favorability, especially among independents.

WSJ: Review & Outlook: Romney Strikes Back