Welcome to another episode of The Investigation.

I'm Chris Vlasto, Senior Executive Producer here at ABC News.

I'm joined by the two lead reporters on the Trump investigation, John Santucci and Matt Mosque.

We're going to be talking later to Jane Sherburn, former special counsel to Bill Clinton.

She was in charge of defending the White House during a fierce congressional investigation 20 years ago.

So she's going to shed some insights on that for us.

But before that, we want to get an update from our senior congressional correspondent, Mary Bruce, about what battles lie ahead here on Capitol Hill.

A brand new analysis in the Washington Post shows the White House is blocking 20 separate congressional

investigations by filing lawsuits, stopping AIDS from testifying, refusing dozens of requests for documents.

Stonewalling on a scale the Democrats say amounts to a constitutional

crisis. Mary, Congress is taking this to a whole new level. Let's hear what Adam Schiff had to say

about this over the weekend. Look, we are going to have to consider other remedies like inherent

contempt where if the courts take too long, we use our own judicial process within the Congress.

What do you think, Mary? Are we in a constitutional crisis?

Well, that's certainly what Democratic leaders think. I mean, you have Nancy Pelosi saying

this is a constitutional crisis. You have the chairman of the Judiciary Committee now saying

that's what he thinks we are in. And they say that because they feel that this administration, according to them, is blatantly stonewalling the request for information.

You see that, you know, top to bottom, the president has made a blanketed point of saying that

they're not going to play ball. They're not going to comply with any request for subpoenas,

anyone that they want to talk to, any documents, that's it. And you see this sort of ratcheting up of the tension between congressional Democrats and the White House to the point that you are at a boiling point. The question then is, what are they going to do about it? And I asked the speaker last week, okay, well, if this is a true constitutional crisis, why then aren't we seeing a march to impeachment? Because

Democrats are kind of stuck in some ways. They don't want to go to impeachment, even though you do

have many even members of the Democratic caucus saying that that needs to be done. But they also want to

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