Motive, MEANS and opportunity.
And very careful compartmentalization so that seperate players get no overall look at the big picture, along with enough redundancy to prevent some single circumstance from throwing any monkey wrench in the works.
But if successful, the players get control of the country, and eventually the entire world. And participants LBJ, Nixon, Ford and Bush Senior got to play president for a while.
And Warren got to be Chief Justice of the Supremes.
Wasn't Dan Rather a reporter down in Daly Plaza that day also?
Well, how conveeeeeenient...