Take a look at Jack Abramoff's archived Greenberg Traurig bio page:

Education

• J.D., Georgetown University Law Center, 1986
• B.S., magna cum laude, Brandeis University, 1981

Admitted to Practice

*Not admitted to the practice of law

That's right, Not admitted to the practice of law.  Now why would someone who is a lobbyist and a graduate of Georgetown University not take the bar exam and make all of that hard work worthwhile?

Let's see, could it be D.C. Bar Rule of Professional Conduct 4.1?

Rule 4.1 — Truthfulness in Statements to Others

In the course of representing a client, a lawyer shall not knowingly:
   (a) Make a false statement of material fact or law to a third person; or
   (b) Fail to disclose a material fact to a third person when disclosure is necessary to avoid assisting a criminal or fraudulent act by a client, unless disclosure is prohibited by Rule 1.6.