Whether it’s Boris Johnson or Jeremy Hunt, the current parliamentary arithmetic means whoever becomes Prime Minister next week will be depending on every last vote in the Commons.
That’s one reason that the outcome of the Brecon and Radnorshire by-election is so crucial.
It was triggered by local voters after their Tory MP was convicted over a false expenses claim.
Brexit is featuring heavily in the campaign, as Plaid Cymru and the Green Party have agreed to stand aside in favour of the Remain-supporting Lib Dem candidate.