Mark Zaid, the activist attorney representing the so-called whistleblower at the center of the impeachment movement targeting President Donald Trump, says he is representing a second so-called whistleblower who spoke to the Intelligence Community’s inspector general about Trump’s phone call with the Ukrainian president. Missing from the avalanche of news media coverage about Zaid’s two anonymous clients rocking the nation’s capital is that at the beginning of Trump’s presidency Zaid co-founded Whistleblower Aid, a small nonprofit that blasted advertisements around D.C. actively seeking whistleblowers during the Trump administration. Whistleblower Aid is heavily tied to far-left activist organizations and Democratic politics....