The climate science establishment is fond of lecturing us about the dangers of rising temperatures. With the return of Donald Trump as US President, however, it is rising scrutiny, not the rising heat, that has them most alarmed. In May, President Trump signed an executive order titled "Restoring Gold Standard Science," requiring federally funded agencies to ensure their work is accountable, reproducible, and subject to open debate. It was unremarkable in tone, bordering on mundane. Yet the reaction was swift and bitter. The clause insisting that scientists consider dissenting views and protect employees from retaliation for expressing them cuts across...