[13] Miller joined the anti-Trump Our Principles PAC (political action committee) following Bush's exit from the 2016 Republican Party presidential primaries, and then drew notice for lambasting Trump supporters with whom he appeared on-air.

The group circulated a research document in 2018 linking anti-Facebook activists with financier George Soros—a frequent subject of antisemitic conspiracy theories—on behalf of Facebook.

[23] He is also an MSNBC contributor,[24] a frequent guest on progressive outlet Crooked Media's Pod Save America podcast,[15][9][22] and co-hosts a regular series on Brian Tyler Cohen's YouTube channel called Inside The Right.

[27] A Rolling Stone column by Miller on seeking background comments from reluctant Republican Trump supporters elicited a widely shared quote, "There are two options, you can be on this hell ship, or you can be in the water drowning".

[28] The book details Miller's political career, analysing the rise of Trump and the motivations of Republican politicians who remained firmly loyal to the MAGA movement,[29][30] and reached #2 on The New York Times non fiction list in July 2022.

[32][33] In a review for The New York Times, Jennifer Szalai called the book "darkly funny" and praised Miller's insights into the inner workings of the Republican Party and the Washington D.C. political scene.

[34] New York Times columnist David French wrote that it offered "painful" insights into the impact of partisanship and Trumpism on the American conservative Right.