It's the gist of a lot of what he talks about so I'm sure he's said very similar things many different ways.

As compared with the other capitalist democracies, the United States is considerably more rigid and doctrinaire in its political thinking and analysis.

• https://chomsky.info/responsibility01/ (Excerpted from Language and Responsibility, Pantheon, 1977)

On climate change:

Here’s an interesting case of manufacture of consent and does it work? You take a look at international polls on global warming, Americans, who are the most propagandized on this — I mean, there’s huge propaganda efforts to make it believe it’s not happening — they’re a little below the norm, so there’s some effect of the propaganda.

• https://chomsky.info/20141003/ (interview with Chris Hedges, October 3, 2014)