Two FBI officials who worked on Special Counsel Robert Mueller’s Russia investigation exchanged text messages last year in which they appear to have discussed ways to prevent Donald Trump from being elected president. “I want to believe the path you threw out for consideration in Andy’s office — that there’s no way [Trump] gets elected — but I’m afraid we can’t take that risk,” FBI counterintelligence official Peter Strzok wrote in a cryptic text message to Lisa Page, an FBI lawyer and his mistress. “It’s like an insurance policy in the unlikely event you die before you’re 40,” Strzok wrote...