Months before a whistleblower complaint that would spark the Democrat effort for impeachment, a shadowy liberal group founded and staffed by Obama administration alums and former Democrat congressional staffers launched an outside investigation into whether President Trump’s allies were seeking “foreign interference” from Ukraine in the 2020 elections. The group, American Oversight, began investigating the issue in May — more than two months before the “whistleblower” filed a complaint alleging Trump was “using the power of his office to solicit interference from a foreign country to investigate one of the President’s main domestic political rivals.” The group’s purpose is to...