Former President Barack Obama implicitly criticized President Donald Trump’s media habits in a speech on Wednesday. During a Splunk tech conference, Obama said it was helpful as president to have a diverse staff offering a wide range of advice on the issues of the day. “The other thing that is helpful is not watching TV or reading social media,” he added pointedly, according to Axios. He warned about people living in “filter bubbles” of information, made worse by social media. “That’s not healthy for a democracy and it’s not healthy between countries,” he said. “That’s how wars get started and...