For a man many believe to be highly intelligent, Senator Dastyari shows incredibly bad judgment. But what has not been properly examined yet is the full scope of his involvement with Chinese donors, and some of his questions in Senate Estimates hearings.

Consider his performance on the 27th May, 2014 when he asked a series of highly injudicious questions about national security.

First of all, he publicly probed security arrangements concerning the Prime Minister's close protection detail, and who was responsible for advising on security at particular functions. He persisted in asking questions on this in spite of being told by officials that was not something that should be canvassed in public. In this day and age, that in itself shows very poor judgement.

For Senator Dastyari that was merely a warm up for his main game, which was an extraordinary series of questions about intimate details concerning Australia's national security arrangements. For example, he wanted to know how the Associate Secretary for National Security and International Policy in the Department of Prime Minister and Cabinet liaised between the Prime Minister and the Department of Foreign Affairs.