She had visited three different websites purporting to tell people how to vote in individual precincts to stop Brexit. One of them said Labour, and the other two the Liberal Democrats.
Current polling suggests the Remain vote will split in the Two Cities, allowing a weakened Conservative candidate to hold the seat. Across the country, were only 120,000 more Remainers to vote tactically, one analysis showed, that would be enough to defeat Mr. Johnson on Dec. 12.
But for now, in crucial London districts, the race has become a battle of bar charts, as both Labour and the Liberal Democrats try to prove they are best positioned to win three-way fights for seats. Labour has printed reams of them showing how it cut into the Conservatives’ lead in the 2017 election, capitalizing on the same shifts that have turned American cities into progressive bulwarks.
But the Liberal Democrats, relying on more recent polling, have distributed their own sheafs of charts with exactly the opposite message.
Couple that with the hazy mechanics of how a left-wing coalition would actually try to stop Brexit, and Remain voters are stuck in a confusing predicament.
“If you are a Leave voter, the route to your destination is now really clear and simple,” said Rob Ford, a politics professor and the editor of “Sex, Lies and Politics: The Secret Influences That Drive our Political Choices.” “Whereas if you’re on the Remain side, what’s the route to your desired destination? It’s as clear as the channel on a foggy day right now.”
Remain voters are torn by Mr. Corbyn’s cautious, some would say muddled, Brexit policy, in which he would negotiate a new exit deal with Brussels and then put it beside Remain in a public vote in which he himself would stay neutral.