美国多个选举办公室和国会办公室收到可疑白色粉末美国联邦和地方执法机构正在调查一系列含有潜在危险白色粉末的可疑包裹，这些包裹被寄往多个选举办公室和国会办公室。
Suspicious white powder sent to multiple U.S. election, congressional offices Federal and local law enforcement agencies in the United States are investigating a series of suspicious packages containing a potentially hazardous white powder that were sent to multiple election and congressional offices.