If you're thinking that was written by stalwart Democratic partisan, you can be forgiven; but you are flat wrong. Bruce Bartlett is a veteran of the Reagan and Bush-41 administrations. It appears he may have moved beyond the GOP, but only as far as "independent". A Democratic partisan he simply is not.
What makes his paper fascinating is that his conclusion (above) applies even after controlling for party membership, political ideology, etc. That is, you can be a staunch Republican, but if you do not follow Fox News, you will know a lot more about what is really happening in the world than if you do follow it. Somehow, it seems to me like something that would make it hard to come up with, and sell to your supporters, policies which will actually work.
Here's your chance to come up with ways for a political party to florish, even when your most motivated base followers are more ignorant than those who know nothing. That is, they know a lot of stuff that just is not, objectively, true. Feel free to offer up examples of any party and any ideology -- whether they turned out to work well when tried, and under what constraints (e.g. enforced information isolation).