I've been rereading the book
"Interface", by Neal Stephenson and George Jewsbury.
In the way that Catch-22 explained the military and The Right Stuff explained the culture of military pilots, I find that Interface explains the messy world of presidential elections.
The book was written in 1994, and the key plot-point at the beginning was that 'the president' had run the country into the ground and rung up a National Debt of the unimaginable amount of Three Trillion Dollars! -- hey, wait! holy life-imitating-art Batman!!!
The sitting president proposes 'debt forgiveness'...
Naturally, the corporation network that bought that debt moves to protect their investment by buying the presidency.
I highly recommend reading it, both for the entertainment and so that you may see this election with eyes somewhat less clouded...
Karen