Article snippet: Cracks are starting to emerge in the White House's overarching strategy not to cooperate with any aspect of House Democrats’ impeachment investigation and other probes. In the course of a few hours Friday, former U.S. Ambassador to Ukraine Marie Yovanovitch appeared on Capitol Hill to testify, defying the White House’s order that she skip the closed-door deposition. Gordon Sondland, U.S. ambassador to the European Union, indicated he will testify on Thursday, after the State Department blocked his appearance this week. And a federal appeals court ruled Friday in favor of Democrats seeking Trump’s tax returns and other financial records — documents the president has refused to turn over. After watching their investigations get bogged down for nearly a year by Trump’s stonewalling tactics, Democrats’ aggressive oversight efforts are finally beginning to bear fruit. In a letter to Democratic colleagues Friday, Speaker MORE (D-Calif.) heralded the “major victory” in the Mazars case, where the D.C. Circuit Court ruled that Trump’s accounting firm would need to comply with a House Oversight and Reform Committee subpoena demanding financial records from Trump and his business entities. The Speaker also called attention to a joint statement from 17 former Watergate prosecutors who called on the House to continue carrying out the Trump impeachment investigation “fairly, openly and promptly.” “This week, we have seen increased outside validation of our efforts to hold ... Link to the full article to read more