Two down ...
For Nick Bourne, there was no choice. The blunt realities of the electoral system meant his years as party leader were at an end.
In essence, after a bad election, there was little choice for Ieuan Wyn Jones either. He is to give up the Plaid Cymru leadership, though not quite yet. Mr Jones plans to stay on while the party - the party he took from 82 years of opposition to government and back, for now at least, to opposition - has time to work out what went wrong on May 5th and what must change in terms of structure and strategy before it moves on.
In fact he gives it quite some time. He will go "some time in the first half of the Assembly term". That is two years and counting - quite some leeway and far too much for some, I suspect, though it is, I'm told, certainly "not a target".
He's on his feet now, in Anglesey, reading out a statement that, I'm told, will spell out his thinking.
It is absolutely no secret that Lord Dafydd Elis-Thomas is one Plaid member who wants to see the party conduct a short, sharp review, elect a new leader and stike a deal that lets Plaid march back into government with Labour, all as soon as possible. Simon Thomas, brand new AM but old Plaid hand, is the leader of choice, or so it's whispered in Cardiff Bay. You never know, he might fancy it himself - "a last hurrah!" - suggests one Plaid source.
Others shake their heads and warn against a swift move back to the fifth floor. There would have to be "major sweeteners" said one, before Plaid should even contemplate any kind of deal. It must work out what it's about and until it knows exactly where it wants to go, then forget any deals along the way. Those voices say that the former Presiding Officer is "isolated" - but admit that he's a man who rarely, if ever, fails to build the bridges necessary to get to precisely where he wants.
Plaid will have heard Carwyn Jones dismiss the Liberal Democrats as "too toxic" and beyond the pale as far as any kind of deal goes. Truly "inedible" as Rhodri Morgan once put it. But Plaid? The First Minister talked of calling "Ieuan." He wouldn't elaborate but certainly didn't rule out a future deal. The difference in tone pointed to one door firmly shut and another - the only other one available to a man who doesn't want to lead a minority government for five years - more than ajar.
I know that many in the party have asked Mr Jones to stay on, to see them through this next phase. They - and no doubt many of us - suspect that no matter how Plaid had fared on May 5th, he was planning to give up the leadership during this term.
The question now is how long his party lets him stay.