The resignation of a key figure in Donald Tsang Yam-kuen's campaign office could be a blessing in disguise - if it raises the alarm over the potential for mistakes by his own supporters. There is little chance of serious repercussions over the short-lived Lawrence Lam Yin-ming affair. Mr Lam, deputy commandant of the auxiliary police force, left the Tsang campaign quickly once the breach of the auxiliary police's internal rules was revealed. The downside is that there are bound to be questions over why Mr Tsang and his team failed to come clean on such important issues as conflicts in their various roles. People have good reason to demand more from the Tsang team. Most of its key members, including Mr Tsang, are veteran public officers known for their vigilance and adherence to rules and procedures. The wrong-footing of Mr Lam came after Mr Tsang's election bid was hit by a controversy over advertisements last week. The adverts - funded by a clan association, including some tycoons and a young industrialists' group - may have breached the Corruption and Illegal Practices Ordinance. They were published in two pro-Beijing newspapers without specifying their election-related nature and without prior consent from Mr Tsang's office. Though different in nature from Mr Lam's case, the advertisement controversy cast a negative light on Mr Tsang's campaign. The two incidents look unlikely to be the end of negative publicity for Mr Tsang's election bid. Quite the opposite. Negative news stories sell, of course. But aside from that, Mr Tsang and his campaign face a more critical public in view of the overwhelming support for him in the Election Committee and the community at large. Now that the election outcome looks certain, finding fault with the campaign process will figure prominently in the game, particularly when it comes to the Tsang team. The risk of missteps and controversies could be higher for Mr Tsang than for other candidates. His supporters' enthusiasm may lead them to volunteer what they see as a helping hand - not knowing their initiatives could be counterproductive. Press reports have quoted Mr Tsang's supporters as vowing to score a convincing victory: more than 700 of the Election Committee's 800 nominations. The election is already tarnished, in some circles, by its 'small circle' nature. Mr Tsang's sweet victory could turn sour if his campaign comes under the shadow of dirty tactics, controversies and inappropriate practices.