Welcome to The Investigation. I'm Chris Flastow, senior executive producer for ABC News.

Joining me today, a senior editorial producer, John Santucci, who's been covering the Trump administration since the very beginning.

And after a brief hiatus this summer after the Mueller

report was released, and boy, we are coming back with a vengeance. This story that has broken

in the last week has taken Washington by storm. When there were calls for impeachment months

ago in the Mueller report that seemed to die on the vine. Finally, Nancy Pelosi

this week has come forward and opened up an impeachment inquiry into the president for a phone

call he made with the Ukrainian president back in July. And we have in the studio with us, Terry Moran,

senior national correspondent with ABC News, and Mary Bruce,

our senior congressional correspondent, joining us from Capitol Hill. And Mary, you've covered Nancy

Pelosi, and so have I for a long period of time. And Nancy Pelosi, who has been so reluctant

to get into this impeachment game, got in the game yesterday. Let's listen to what she had to say.

The actions taken to date by the president have seriously violated the Constitution,

especially when the president says, Article 2 says, I can do whatever I want. For the past several

months, we have been investigating in our committees and litigating in the courts.

So the House can gather all the relevant facts and consider whether to exercise its full Article I powers,

including a constitutional power of the utmost gravity approval of articles of impeachment. And this week, the President has admitted

to asking the President of Ukraine to take actions which would benefit him politically.

The actions of the Trump presidency revealed a dishonorable fact of the President's betrayal

of his oath of office, betrayal of our national security,

and betrayal of the integrity of our elections. Therefore, today, I'm announcing the House of Representatives moving forward with an official impeachment inquiry.

I'm directing our six committees to proceed with their investigations under that umbrella of impeachment inquiry.

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