The interesting thing about political propaganda is the increasingly intense cascade of problems it causes over the subsequent generations after its inception.
What I mean by this is that when someone lies for political gain, or even better a group of interests advances a campaign of sustained lies with think tanks, foundations, lobbyists, media propaganda and what have you, you end up left with two parties: the benefiting party that is doing the lying for self-gain, and the receiving party that is being lied to so that the benefiting party can keep doing what it is doing. Typically a lie is fashioned for short term purposes: one can afford to detach a narrative from reality if one doesn't expect to deal with the problems that will eventually arise with that act.
Salient lies continue to circulate well after the lying party has departed with its benefits. You have generations of people growing up living by these lies, because many people just do what they are told; it is a comfortable ride living your life in social conventions, so long as they are stable and get you what you need. You do what you are told and you receive the related gifts.
But then there is a problem: you have a generation of people living on and acting on what they believe to be truths that are misaligned with the underlying reality. And then if these people form a political interest group that is put into the position of lying to their constituents for personal gain, they have no choice but to fashion lies in relation to a worldview that is itself a system of coherent lies. You are seeing distortions put on top of distortions. So you are slicing off pieces of reality with each generation of propaganda, and in subsequent generations you are slicing off of pieces that have themselves been sliced off, and so you drift further and further from reality, and become unable to solve even simple problems having to do with reality as a result.
In the end, you are left with a generation that produces problem-solving organizations such as the extreme section of the Republican Party. Sucks!