What's the intended difference between GD and GD:P now?

[Recursion]

It made sense when it was General Discussion:Primaries (aka general discussion: flamewars), and I vaguely remember back when it was General Discussion: Politics that it seemed to be more for horse-race inside-baseball type OP's than General Discussion was. But GD today has plenty of articles about the Presidency, and GD:P has plenty of articles about Congress

Basically, if I'm going to post something, is there a rule of thumb about which one I should post it in?

[Skinner]

1. Here's the rule of thumb:

Post in whichever forum you want to.