This comes close to articulating what I’ve sensed:

Frankly, the Trump era has made booking a show like ours more challenging, in part because the President brought along so little of the traditional conservative commentariat with him, even as he consolidated his support in the Republican Party. We’re not the only show that’s found it harder to book panels that both reflect the current state of political disagreement in America and produce a good-faith conversation from shared factual premises.

Josh Barro, introducing a change in format of the Left, Right & Center podcast, which many listeners perceived as having lost its “Right.”

Trumpists, strongly tending toward trollery, tend not to get booked because they fail either the “good faith” or “shared factual premise” test.