NADLER: Well, I think what these indictments and filings show is that the president was at the center of a massive fraud -- several massive frauds against the American people.

And it's now our job, the job of the Justice Department, the special prosecutor -- the special counsel, and the Congress to get to the bottom of this, to find out exactly what was going on, to find out the extent of the president's involvement, to find out basically what the president knew and when did he know it, so that we can then hold him accountable.

JAKE TAPPER: If it is proven that the president directed or coordinated with Cohen to commit these felonies, if it’s proven -- and I understand it has not yet been -- it’s been alleged by the prosecutors, but has not been proven.

If it's proven, is -- are those impeachable offenses?

NADLER: Well, they would be impeachable offenses.

Whether they are important enough to justify an impeachment is a different question. But, certainly, they would be impeachable offenses, because, even though they were committed before the president became president, they were committed in the service of fraudulently obtaining the office. That would be the -- that would be an impeachable offense.

But the fact of the matter is that what we see from these indictments and charging statements is a much broader conspiracy against the American people involving these payments, involving an attempt to influence the campaign improperly, with improper payments involving the Russians trying to get influence in the campaign, involving the president lying for an entire year about his ongoing business arrangements, business dealings with the Russians, involving obstruction of justice. . . .

You don’t necessarily launch an impeachment against the president because he committed an impeachable offense. There are several things you have to look at.

One, were there impeachable offenses committed, how many, et cetera? And, secondly, how important were they? Do they rise to the gravity where you should undertake an impeachment?

An impeachment is an attempt to, in effect, overturn or change the result of the last election. And you should do it only for very serious situations. So, that's always the question.