If his Twitter activity is any indication, President Donald Trump is getting nervous about what's coming next out of the Mueller investigation — especially as it relates to the testimony of his former fixer, Michael Cohen, who's been cooperating with the special counsel. Legal observers have pointed to his disparaging tweet towards Cohen as potential evidence of obstruction of justice. Meanwhile, three sentencing memos are due from Mueller this week: for Cohen, former security advisor Michael Flynn, and ex-campaign chairman Paul Manafort. To discuss the latest in the Russia probe, Jim Braude was joined by former U.S. attorney Don Stern, who worked alongside Robert Mueller both during his stint with the Department of Justice and in private practice at Hale and Dorr; and Nancy Gertner, retired federal judge and senior lecturer at Harvard Law School.