Civil Liberties

Although that's in fact how South American politics usually work:

They often have myriad small parties running - but most of the oxygen will typically be sucked up by one large party/coalition on the right, and another one on the left.

The one on the right usually appeals mostly to white/middle-class voters (plus some in the working class hoping to 'belong'), and often sounds like Trump.

And the one on the left will often sound like Bernie.