As a young federal prosecutor in the 1990s, Rod J. Rosenstein played a key role in the highly charged independent investigation of the president and first lady, Bill and Hillary Clinton, over their investments in a failed real estate company known as Whitewater.
Rosenstein now is poised to take over another sensitive investigation: the FBI counterintelligence inquiry into whether President Trump’s current or former aides colluded with Russian intelligence to interfere with last year’s election.
The Senate is expected to easily confirm Rosenstein as deputy attorney general, the No. 2 position in the Justice Department, on Monday night.
The 52-year-old career federal...