There is still a primary, but the incumbent has only lost his party's nomination 4 times, only Democrat Franklin Pierce in 1856 was elected the other 3 ascended from Vice President. It has never happened since the modern primary system was created in the 1970s.
They never talk about how the allies evaded detection by the German's satellite network, comprehensive radar imaging, and observers with access to a global information network that can send messages any ware in the world in fractions of a second.
people used to do it all the time, but as it was passed around it degraded now all you get is "/s"