People who are sad right now that they didn't run for president: Warren, Biden.
Claiming brexit means brexit is all very well and all. But what does brexit mean?
The referendum never answered the question of how the relationship between the UK and the EU should be. Only that it shouldn't be the existing one.
Had they just done that it would have prevented the current mess where Westminster now gets to negotiate a worse treaty than they had to protect the economical interests of the UK.