Special counsel Robert Mueller abided by Justice Department guidelines that a sitting president can’t be indicted, but in preparing the detailed 448-page report, the long-time law enforcement official has teed up an investigation into obstruction that could outlive President Donald Trump’s time in the White House and his temporary immunity.

In declining to reach a traditional prosecution decision, Mueller wrote that he was adhering to DOJ guidelines and also considered the “burdens” an indictment would place on the President’s ability to govern and respond to the allegations while in office.