Astrology, Spirituality & Alternative Healing

So predicting his behavior will be more difficult.

However, I would counter the example by saying that yes Breivik is obviously much more disturbed along psychotic lines.
He is not as cunning, or happy to pull one over on people as Trump is.

Trump would delight in any argument that lets him win.

So that is what is different, Trump has the wherewithal to pull stunts and take great pride in evading jail by any means.
He would literally laugh as he left the courtroom if was able to make fools out of the judge and jury.

Breivik and Trump are different pathologies.

Edit to add: If the legal field does not listen to what the psychologists are telling them about Trump, their job will be much harder.