RUSSIA | S02 06 - Don McGahn: Mueller's star witness
Lawyer Don McGahn was on the Trump train from the beginning.
But the dream job of White House Counsel quickly turned into a nightmare, as he slowly fell out of favour with the President.
Then one night McGahn was forced to make a choice of historic proportions: help Trump potentially commit a crime or resign.
McGahn has found himself the centre of attention, as his testimony to Robert Mueller implicates the President in possible obstruction of justice.