What instruction are you referring to? Political was never designed with RTL support, to add it would require a lot of new code, much of which would not be compatible with the existing code in the theme.
Political was released before the Vertex framework was developed; unfortunately, pre-framework releases can no longer be updated due to significant changes in how WordPress works. I would suggest looking at more recent releases to see if there's something newer that you can be happy with. The first Vertex release was Paradigm Shift, and the first responsive release was Business Response. I personally recommend not using anything older than Business Response, but that is mainly because the pre-responsive releases that use Vertex will need to be patched with the Vertex Upgrade Patch
before they are fully compatible with the latest version of WordPress, and a couple of them used custom code that doesn't work well on the newer version of the framework.