Two intelligence officials referred a whistle-blower’s concerns about the call to the Justice Department for a possible criminal investigation. After a review, it declined to open one, a Justice Department official said. Here are the latest updates.

On Tuesday, Speaker Nancy Pelosi accused Mr. Trump of betraying the country and announced that the Democratic-led House would begin a formal impeachment inquiry.

Ms. Pelosi had been reluctant to start the process because of the likely political consequences, but she said that revelations about Mr. Trump’s dealings with Ukraine and his administration’s stonewalling of Congress had left the House no choice.

The details: Here’s where every House member stands on impeachment and how the process works. (Only two presidents, Andrew Johnson and Bill Clinton, have been impeached, and both were ultimately acquitted. Richard Nixon resigned in 1974 to avoid being impeached.)

Response: Mr. Trump said the impeachment battle would be “a positive” for his chances of winning a second term next year.