By Jason Morrison

Senator Arthur Sinodinos stood aside from his Assistant Treasurer role in March because of unresolved inquiries in the NSW ICAC. Sinodinos denies any wrong doing. 

The NSW Police Minister Michael Gallacher stood down when someone alleged he was tarnished in the same inquiry - even though he completely denies suggestions of wrong-doing. 

So far, Bill Shorten has been named twice in activities of interest to the Union Royal Commission. 

Bob Kernohan gave evidence that Shorten told him to think of his career, and drop his pursuit of slush fund allegations in 1996.

And yesterday, Shorten became directly involved in elections of the troubled Health Services Union when he was a senior member of the Rudd government in 2009 by donating $5000 to a candidate’s campaign, it was alleged at the royal commission into union corruption today.

In fairness, Bill Shorten disputes both accusations - but so did Sinodinos and he's gone and so did the NSW Police Minister and he's gone to. 

So, back to the start .... When do you reckon the press gallery might start questioning the suitability of Bill Shorten being Opposition Leader?

Would a conservative politician be afforded the same benefit of the doubt?