RussiaGate is now a complete dead letter — but ObamaGate is taking its place. Just how far did the then-president go to cripple his successor? It’s now clear the Obama-Comey FBI and Justice Department never had anything more substantial than the laughable fiction of the Steele dossier to justify the “counterintelligence” investigation of the Trump campaign. Yet incessant leaks from that supposedly confidential probe wound up consuming the Trump administration’s first months in office — followed by the Bob Mueller-led special counsel investigation that proved nearly the “total witch hunt” that President Trump dubbed it. Information released as the Justice...