Book excerpt: In early 2016, as it became increasingly apparent that Donald Trump might actually become the Republican nominee, a movement within conservatism formed to stop him: Never Trump. Comprised primarily of Republican policy elites and conservative intellectuals, the Never Trumpers saw Trump's stated views as a repudiation of longstanding Republican foreign and domestic policy goals. Just as importantly, they saw him as erratic, mendacious, and unfit--the sort of person the founders warned about and someone who would bring everlasting shame to the Republican Party. Over the coming months, many well-known and previously influential figures signed on to the Never Trump movement. Of course, their efforts failed, and Trump now dominates the Republican Party like a warlord. As Robert P. Saldin and Steven M. Teles argue in Never Trump, however, the influence of the movement turned out to be much larger than its disappointing impact on the election. For one, it has had an enormous impact on the actual composition of the Trump administration. There has never been a party in the Western World that was elected and sought to govern with such a wide range of intra-party opposition. As Trump supporter Pat Buchanan observed after the election, the Never Trumpers essentially gifted Trump with a readymade enemies list-a list that those in charge of appointments paid close attention to. Trump's picks for a wide range of positions, especially in the area of foreign policy, look vastly different than they would have in any other Republican administration, in large part because so many potential office-holders had declared themselves implacably opposed to Trump. Even more profoundly, the administration found it very difficult--and in many cases impossible--to fill a wide range of positions because all of the plausible candidates for jobs that required technocratic as well as ideological credentials had signed on to Never Trump. Never Trump examines the reasons for this widespread and unprecedented intra-party opposition to Trump, why it took the form it did, and its longer-term consequences.