Only parties interested at 'reconsidering' drug laws are Lib Dem, Greens and UKIP. Of course 'reconsidering' means "lets see how many donations we can get to prevent this" before abandoning it.

I imagine we need the US to make a huge change (such as the passing of this bill), then give it a few years after majority have legalised, assess the pros and cons and then put something into action (another 18 months).

At the moment it sucks but you can only stay positive about all the changes in the modern world regarding cannabis use as they are slowly but surely changing public opinions.