JAKE TAPPER: If the president did, in fact, in that phone call push the Ukrainian president to investigate Hunter Biden and Joe Biden eight times, as The Wall Street Journal reported, is it an impeachable offense, in your view?

SCHIFF: Well, Jake, you know I have been very reluctant to go down the path of impeachment, for the reason that I think the founders contemplating, in a country that has elections every four years, that this would be an extraordinary remedy, a remedy of last resort, not first resort.

But if the president is essentially withholding military aid, at the same time that he is trying to browbeat a foreign leader into doing something illicit, that is, providing dirt on his opponent during a presidential campaign, then that may be the only remedy that is coequal to the evil that that conduct represents.

We’re going to hear from the director of national intelligence on Thursday why he is the first director to withhold ever a whistleblower complaint. And we are going to make sure that we get that complaint, that whistleblower is protected.

And we're going to make sure that we find out whether the president has engaged in this kind of improper conduct. But it may be that we do have to move forward with that extraordinary remedy, if indeed the president is, at the same time withholding vital military assistance, he is trying to leverage that to obtain impermissible help in his political campaign.

TAPPER: Well, that’s certainly the farthest I have ever heard you go when it comes to the possible need for impeachment.