Durham scrutinizing four key figures in Trump-Russia investigation

The secretive Justice Department inquiry into the Trump-Russia investigation's origins now includes former CIA Director John Brennan, former Director of National Intelligence James Clapper, former FBI special agent Peter Strzok, and British ex-spy Christopher Steele.

U.S. Attorney John Durham, whose investigative portfolio recently expanded to include events from the launch of the inquiry in 2016 through the appointment of special counsel Robert Mueller in 2017, has taken overseas fact-finding trips. But Durham's focus on the actions taken by specific individuals makes his mission look like it could transform into a...