Diplomat: John Bolton cautioned him about Giuliani and Ukraine

(AP) -- A State Department foreign service officer will tell House impeachment investigators Wednesday former national security adviser John Bolton cautioned him that Rudy Giuliani "was a key voice with the president on Ukraine," which could complicate U.S. goals in the Eastern European country.

House Democrats plan 1st formal vote on impeachment inquiry

The House will take a vote this week to formalize Democrats' impeachment inquiry amid President Donald Trump's criticism that the probe is "illegitimate." House Speaker Nancy Pelosi says the step is being taken "to eliminate any doubt" about the process as the administration tries to block witnesses and withhold documents.

Ex-Trump aide wants judge to rule on impeachment testimony

An ex-White House adviser scheduled to testify before House impeachment investigators on Monday has asked a federal court whether he should comply with a subpoena or follow President Donald Trump's directive against cooperating in what the president dubs a "scam."

Going after investigators: Criminal review of Russia probe

Investigating the investigators, the Justice Department has shifted its scrutiny of the government's Trump-Russia review to a criminal probe, a person familiar with the matter says. It's raising Democrats' concerns that President Donald Trump may be using federal muscle to go after his opponents.