文件显示，国土安全部在部长离任的最后一天签署了一项数百万美元的协议，从该部长的一位政治献金捐赠者拥有的公司购买五架飞机。
The Homeland Security Department signed a multi-million dollar agreement to buy five aircraft from a company owned by a political contributor of the secretary on her last day, documents show.