I don’t know why there has to be so many over-the-top comments, like comparing either Republican contenders or Sanders to that new Labour Party Head.
As far as political stances, really Cameron is similar to Obama, because both are somewhat socialist , favor open borders and a moral equivalent view. Perhaps from European guilt for the Holocaust and colonialism, Cameron is considerably less anti-Israel than Obama.
However, the main point is that no one running for office in the USofA should be like any European country, because it is the United STATES of America, not just America. We have states that are united under a federal government, not just one big all powerful government, and that is a unique thing about the US and that makes something that Europeans can never come close to.
If we were drifting to a loss of state rights before, that has been greatly accelerated under Obama.
Some Republican candidates are trying(more than others) to reassert that form of government again.
As far as that Labour candidate, I read an op-ed by a Brit and he felt that by choosing such a radical leader, much more than the guy who was just defeated, the Labour Party has doomed itself to even further loss of support. Brits don’t want such a radical guy.