 The FBI said they were investigating it as a potential act of domestic terrorism, but the absence of a clear ideological motive by the man shot dead led conspiracy theories to flourish. FBI officials said they were combing 20-year-old Thomas Matthew Crook's background in social media activities while working to get access to his phone. They were joined by Attorney General Merrick Garland and FBI Director Christopher Wray. We are investigating this as an assassination attempt, but also...