It depends on who your readers are, but I think it's optimistic to expect English speakers to know much about the meeting between centre-left and centre-right politicians over dinner at Gianni Letta's home to try to find a solution the question of electoral reform and at the same time limit the influence of smaller parties.
As far as I know, there is no widely accepted English version of what is, after all, a fairly arcane piece of local political shorthand.

HTH

Giles