They are smart people and I can’t imagine them barring themselves from knowledge of the potentially cataclysmic current events happening now. So, I assume they read and watch like everyone else. What sources (or source) they go to, I don’t know. I suppose they may even leave breadcrumbs around to indicate that they sample a number of sources and from different parts of the political news spectrum.
I hope they have enough intellectual and legal discipline to remain open minded but although they are indeed smart, they are also human.