courting Bernie Sanders supporters by flip-flopping on long-held stances

Uh- that's what's called "moving the platform to the left" Mike. One of the things Bernie entered the race to do.

the "Nader nag" - the meme that says if you vote your conscience you're helping to elect the enemy {emphasis mine]

Which is exactly what happened, Mike.

NB: realpolitik noun

A system of politics based on practical rather than moral or ideological considerations.