WASHINGTON — Attorney General Jeff Sessions was interviewed last week by investigators for Special Counsel Robert Mueller’s probe into possible coordination between Russia and Trump associates, according to Justice Department officials. Sessions was questioned for several hours, the officials said. In addition to the Russian coordination probe, Mueller is also investigating whether President Donald Trump or any White House officials sought to obstruct justice in the probe. The attorney general is recused from that investigation, but could be a key witness to the events under scrutiny.