I have. I'm not going to mention which ones as that would cheapen the general message, which is bigger than politics. And yes, I no longer believe them.
Triangulation. Take in news sources from opposite sides of the political (scientific etc) spectrum and take them all in in equal size/depth. They'll repeat their own message to make you believe you are "on the right side of the issue" but with triangulation both brainwashing attempts cancel out.