If he can’t impeach Donald Trump, he may try to oust the president the old-fashioned way. Former billionaire investor, climate activist and impeachment agitator Tom Steyer will take several steps toward a 2020 presidential bid Tuesday. That will include a six-figure web ad buy on Twitter, Facebook, YouTube and Instagram, along with a full-page ad in USA Today and other Gannett newspapers outlining a political platform, a revamped TomSteyer.com and the announcement of five town halls across the country, the first of which will be in the crucial early primary state of South Carolina, according to copies of the ad...