The Frame Every midterm since 1938 has obeyed a gravitational law: the president’s party loses ground. The magnitude varies — 1994, 2010, 2018 — but the direction never does. Voters treat midterms as a thermostat, cooling the fever of unified government. The 2026 cycle looked, at first glance, like another iteration. President Trump’s Republicans surrendered the House and Senate. Democrats flipped three North Carolina districts that had been drawn for Republican durability. Utah’s Blake Moore watched a 32-point margin collapse to eight. Arkansas’s French Hill bled seven points from his 2024 performance. The thermostat clicked. But the temperature did not drop. The reckoning underway in Republican circles — Vice President Vance distancing himself from the ticket’s down-ballot drag, Senators Cruz and Cornyn publicly debating whether the party’s voter-loyalty model has inverted — suggests something the thermostat metaphor cannot explain. The mechanism that translates electoral pain into institutional adaptation has seized. The pendulum...