Don’t think so. One of those leaders will almost certainly be out of a job within a week, and their replacement will lead to a shift in the tenor of uk politics, and the Overton window moves.
By the time the DNC and RNC are held, the UK opposition will likely be led by an entirely different team, and the political environment will be in a different phase. Probably still arguing over Scotland and Brexit though.
The online progressive shows like Michael Brooks, Kyle Kulinaki David pakman are big supporters of Corbyn and say he’s similar to sanders.
Corbyn voted against the Iraq war, always spoken out on issues of poverty, union rights, Palestine rights, rebels against the party etc.
I can’t imagine anybody further to the left than Bernie Sanders.
The main reason why Labour will lose seats is because of Labour LibDem Voters and LabourBrexit voters.