I don't think the US has any legal restrictions on foreign involvement in campaigns.
(note: this post is specifically in response to Stumpokapow, not to Berniegate)
It doesn't really work like that in this case. Sanders literally can't win the nomination, but he will through his near-ish success be able to sway party policy for the upcoming election in the name of bringing the party together towards winning. That's what it's about now. Don't expect Sanders to drop out until the convention, from my understanding.
(note: this post is specifically in response to Stumpokapow, not to Berniegate)
Ashton should probably pack up for next week, given that Obama is starting to campaign for Clinton soon and Sanders' campaign is pretty much finished.
It doesn't really work like that in this case. Sanders literally can't win the nomination, but he will through his near-ish success be able to sway party policy for the upcoming election in the name of bringing the party together towards winning. That's what it's about now. Don't expect Sanders to drop out until the convention, from my understanding.