Former N.J. Gov. Chris Christie weighed in on the Michael Flynn case, which he called "an absolutely classic perjury trap," and the vindication of his staffers involved in the "Bridgegate" scandal Sunday on ABC's "This Week" roundtable.

"They went in there and then wrote notes afterwards about trying to decide whether or not they should try to get the truth out of him, or they should try to get him to lie so that he would -- he would get fired or charged," he said of Flynn. "And then this week as well, and one that involved me and my former team, the Supreme Court rejected 9-0 a false prosecution that was brought by the Obama Justice Department and a vindictive prosecutor politically motivated against -- against folks who worked for me when I was governor of New Jersey."

"You know, it's a bad week for the Obama Justice Department, for Jim Comey and his FBI and for Eric Holder and Loretta Lynch and their Justice Department. You can't run away from that."

STEPHANOPOULOS: the charges against former National Security Advisor Michael Flynn for lying to the FBI, even though he had pled guilty on two occasions to that. That's now going to be before a judge.

And we heard former President Obama weigh in on that on a phone call this week with his former staffers.

BARACK OBAMA, FORMER U.S. PRESIDENT: There is no precedent that anybody can find for someone who's been charged with perjury just getting off scot-free. You begin to get worried that basic -- not just institutional norms -- but our basic understanding of rule of law is -- is at risk.

STEPHANOPOULOS: Chris Christie, this is something we've never seen before. And even you, as -- you've been on this program many times, said that the president was right to fire Michael Flynn for being dishonest back when it happened.

CHRIS CHRISTIE, FORMER NEW JERSEY GOVERNOR AND ABC NEWS CONTRIBUTOR: Yes, well, listen, he was dishonest to the vice president and that doesn't change. But, George, there's a bigger point here that the president, former president, Obama, is running away from. The history of his Justice Department right now is getting pretty battered this week. The conduct of these FBI agents in dealing with Mike Flynn -- and I was a U.S. attorney and worked with FBI agents and helped to direct them.

What they did with Mike Flynn was an absolutely classic perjury trap. They knew what the truth was of what he had done or not then before they walked in. They didn't need to interview him. And they went in there and then wrote notes afterwards about trying to decide whether or not they should try to get the truth out of him, or they should try to get him to lie so that he would -- he would get fired or charged. And then this week as well, and one that involved me and my former team, the Supreme Court rejected 9-0 a false prosecution that was brought by the Obama Justice Department and a vindictive prosecutor politically motivated against -- against folks who worked for me when I was governor of New Jersey.

You know, it's a bad week for the Obama Justice Department, for Jim Comey and his FBI and for Eric Holder and Loretta Lynch and their Justice Department. You can't run away from that.

These are unprecedented times because we're taking the covers off of what was some really awful conduct by prosecutors and investigators. And, you know, George, I usually stand up for these folks, but you cannot defend this conduct.

GEORGE STEPHANOPOULOS, ABC NEWS CHIEF ANCHOR: By I -- it seems like by that definition -- I want to bring this to Rahm Emanuel, every time an FBI agent investigates someone when they have some evidence is a perjury trap. I don't fully understand that.

CHRISTIE: That's not true.