Michele Kelemen

With public hearings in the impeachment inquiry set to start Wednesday. We examine the evidence: Do recently released testimonies indicate a presidential abuse of power?

Secretary of State Mike Pompeo has tried to stay out of the limelight in the impeachment inquiry, but as deposition transcripts are released, his role is coming into sharper focus.

The House impeachment committee has released more transcripts. The depositions paint a picture of parallel foreign policies toward Ukraine, raising questions about the secretary of state's role.

The House committees leading the impeachment inquiry into President Trump have released the transcript of their interview with former U.S. Ambassador to Ukraine Marie Yovanovitch.

The House committees conducting the impeachment probe released the first transcripts of closed-door witness interviews. The transcripts included those of the former ambassador to Ukraine.

Deputy Secretary of State John Sullivan has his Senate confirmation hearing Wednesday to become the next U.S. ambassador to Russia. He may face some tough questions on Ukraine.

Secretary of State Mike Pompeo was not in the situation room during the U.S. raid against ISIS. Instead, he was in Kansas, on a trip that has once again sparked questions about a possible Senate run.

The impeachment investigation has led to a growing number of public servants looking for lawyers as they try to abide by conflicting instructions from the White House and Congress.

In written testimony to Congress, Taylor said he "became increasingly concerned" about informal policymaking, driven by Rudy Giuliani, that diverged from official U.S. policy on Ukraine.

Ambassador Taylor, who's serving as the interim head of the U.S. diplomatic mission to Ukraine, is expected to appear before a House panel participating in the impeachment inquiry into the president.

Every administration uses ambassadorships to reward big political donors. But unlike other political appointees, donors don't always have strong resumes in business politics and foreign affairs.

The acting U.S. ambassador to Ukraine is also caught up in the impeachment inquiry. William Taylor is expected to be asked to appear next week before the House committees investigating the president.

Career diplomats are increasingly being subpoenaed by the House Committees leading an impeachment inquiry. They've raised concerns about President Trump's lawyer, Rudy Giuliani's dealings.

President Trump's former national security adviser John Bolton reportedly was trying to caution others about Rudy Giuliani's efforts in Ukraine. Giuliani is Trump's personal attorney.

Marie Yovanovitch, the former ambassador to Ukraine, says she was pushed out of her role based on "unfounded and false claims by people with clearly questionable motives."

Secretary of State Mike Pompeo is blocking employees from cooperating with the House committees leading an impeachment inquiry. The move is raising tensions between political and career officials.

Who's who in the recently-released texts between government officials working on the U.S.-Ukraine relationship? And what do they mean for the impeachment inquiry?

Volker, who was named in a whistleblower complaint about President Trump's contact with Ukraine, resigned as U.S. special envoy to the country last week and is being deposed on Thursday.

Former U.S. Special Envoy for Ukraine Kurt Volker is scheduled to appear before congressional committees on Thursday over his involvement in the Ukraine whistleblower controversy.

The State Department's inspector general has requested an urgent meeting with key congressional committees on Ukraine. The briefing comes amid the House impeachment inquiry of President Trump.