Mastodawn

#Gerrymandering is an odd game. If you have power to rig constituencies (districts in American), you can collect more seats than you deserve. In the #USA, the Republicans are hard at it.

But gerrymandering calculates based on assumed voter intentions. If those assumptions are wrong, it can backfire.

That's what's happening now in #Texas: see #TheObserver https://archive.is/0071G

And it happened on a huge scale in 1970s Ireland: see the #Tullymander https://en.wikipedia.org/wiki/Electoral_(Amendment)_Act_1974 #iepol #uspol

Claire McNab Nov 14

@epistatacadam @beemoh @ChrisMayLA6 Without multi-member constituencies, #STV is just #AV. As the 1947 and 1974 gerrymanders showed in Ireland, STV needs at least 5 seats to produce fair outcomes. (DeV's 1947 gerrymander worked as intended, by blocking Clann na Poblachta; but the 1974 #Tullymander backfired spectacularly on Fine Gael and Labour)