Activating a federal grand jury in Washington is a sign special counsel Robert Mueller’s Trump-Russia investigation is expanding. Here’s what to know about the secretive proceedings.
This story was originally published on CBC News. To read the rest of this news worthy story, please visit http://www.cbc.ca/news/world/grand-jury-robert-mueller-trump-russia-what-to-know-1.4236184?cmp=rss.