L ast week, the polling firm Gallup announced that it would no longer survey presidential-approval ratings. This news stirred suspicions. President Trump’s numbers are declining badly, much worse than Joe Biden’s at the equivalent point in his presidency. Gallup’s most recent presidential-approval poll, in December, had Trump at 36 percent—well below the RealClearPolitics poll average of 42 percent. Trump is known for taking punitive action. He sued The Des Moines Register and its pollster, Ann