Board Thread:General Discussion/@comment-6728073-20130325230328/@comment-4928331-20130327113205

The second seems unlikely -- why would Black Canary sarcastically thank him if this was the result of a no-confidence vote?

The six month terms might theoretically work. Season 1 starts at July 4, 2010 and ends in January 1, 2011 -- Batman was the chairman all throughout, with nary a sign of election. The timeline might fit with 6-month terms beginning from July and running till the end of January, and then February till the end of June. However, it won't fit Atom's term from December, now, would it?

I think the easiest explanation is he pleaded political incompetence, and abdicated. Hence Dinah's annoyance.