Propaganda messaging played and continues to play an enormous role in the public’s view on the Affordable Care Act a.k.a. ObamaCare. For example, Democrats have made pre-existing condition exclusions the centerpiece of their 2018 public commentary on the ACA.
Yet, never explained is that most Americans already had protections against pre-existing condition exclusions – it was the individual market that did not have protections (details in the post). Further, contrary to what you have been led to believe, the ACA does, in fact, establish a pre-existing condition waiting period. The ACA did not eliminate pre-existing condition waiting periods (see post for details).
The propaganda messaging used the methods of Fear, Assertion, Lying and What You See Is All There Is and has been extraordinarily effective. The Republican opposition has been clumsy and largely counterproductive with utterly ineffective propaganda messaging of its own.
(This is a major update to a previously posted item on this topic – formatting, editing and a better explanation of the propaganda methods used have been done to improve the previous post and make it easier to understand.)