American politics increasingly operates according to an unforgiving binary. One cannot, it seems, be a little bit MAGA any more than one can be a little bit pregnant.
Bill Cassidy learned that lesson this week after losing his primary bid to return to the Senate, despite voting with the administration the overwhelming majority of the time. By most estimates, he supported the president’s position well over 80 percent of the time. He backed most nominations, including some he openly expressed reservations about, such as Robert F. Kennedy Jr.. On taxes, judges, regulation, and most major partisan questions, he remained a reliably conservative Republican.
But there were moments when he broke ranks. Most notably, he voted to convict Donald Trump following January 6th — a moment that, for many in the movement, became a defining test of loyalty rather than a matter of constitutional duty. He also retained the occasionally dangerous habit of asking questions aloud rather than merely performing agreement.
In another era, that might have been understood as ordinary senatorial behavior.
Increasingly, it is treated as disloyalty.
This pattern has repeated itself throughout the Trump era. Figures as ideologically conservative as John McCain, Mitt Romney, Jeff Flake, and others discovered that disagreement with the movement’s central figure carried consequences regardless of broader alignment. Some retired. Some were defeated. Some simply concluded there was no remaining space for partial dissent within the coalition. Even Marjorie Taylor Greene — hardly a moderate — recently learned that deviating from executive preference Epstein investigations could produce rapid political isolation.
Political parties, of course, have always demanded discipline. Parliamentary systems often function through far stricter party cohesion than Congress historically tolerated. But the American constitutional structure was designed around a somewhat different assumption: that legislators would possess at least intermittent independence from the executive branch, even within their own party. The Senate, in particular, long prided itself on being a deliberative body capable of resisting presidential pressure when conscience or judgment required it.
The Founders did not imagine Congress merely ratifying presidential preference.
And yet one increasingly senses that many modern legislators are judged less by the quality of their deliberation than by the consistency of their alignment. Votes once regarded as matters of persuasion or conscience are now treated as tests of affiliation. The pressure is not simply to support the party, but to embody the movement emotionally and rhetorically at all times.
That shift carries implications beyond any one politician.
A republic depends, at minimum, upon some meaningful separation between its institutions. If Congress gradually evolves into an extension of executive authority rather than a counterweight to it, the constitutional balance begins to narrow. Critics increasingly argue that parts of the judiciary are drifting similarly into ideological camps, though those debates remain more contested and institutionally complex.
Cassidy himself was never likely to become a folk hero outside centrist circles. He is a physician by training, technocratic in temperament, and often visibly uncomfortable with theatrical politics. But he occasionally appeared willing to risk political damage in defense of a judgment he believed correct.
That quality used to be called independence.
Now it more often looks like liability.
But perhaps that is the nature of courage in political life. If dissent carried no meaningful consequences, we would not call it courage at all.