In the UK, Labour's hard left turn helped cement a long run of tory government; only Starmer's forceful rejection of his party's far left flank brought Labour back.
Maybe you're over-reading a single datapoint and neither France nor the UK are good proxies for "all political contexts everywhere"?
Comparing this year's vote total to that of recent previous elections, I think that's a misread of the UK's election.
That Starmer got fully 3 million fewer votes than Corbyn's high watermark against Theresa May seems a relevant data point, at very least.
Except that negative partisanship drove a huge number of votes *against* corbyn's Labour in much the same way it does against Trump here. Do you think that turnout was so high in 2019 because people just loved Boris Johnson? Also, that was the brexit election
I only have an outsider's perspective, but my read at the time was that that was driven by the party's internal strife (ie, as I recall the party's centrist wing had been working pretty hard to oust Corbyn prior to that election) getting a pretty significant level of media coverage.
Yeah, the impression I'd gathered was that this was a pretty emphatic "not Tory" election with a Labour message that really failed to energize.
Demanding a candidate stop campaigning because his profile was getting *too big* was one hell of a choice, too - and probably handed Farage his seat.
