It’s the Christmas season.  Let’s make a list. British prime ministers that served since 2000.  Boris Johnson, Theresa May, David Cameron, Gordon Brown, Tony Blair. Taoisigh during that 21-year period.  Micheàl Martin, Leo Varadkar, Enda Kenny, Brian Cowen, Bertie Ahern US Presidents. Joe Biden. Donald Trump. Barack Obama. George W. Bush. Bill Clinton. In theory, in each of the jurisdictions, the job represents the top rung of the career ladder. But pick any one of the 15 individuals, look at their time in charge and ask would they consider it an uninterrupted period of blissful happiness?  Or is it more…