Why thanky for the name drop! But I also want to make sure to say that I fully support politicians changing their stance......... when presented with superior data. Admittedly, it is hard to determine why a politician has changed their stance... changing morals of the electorate, influential lobbyists with seemingly convincing data, new scientific breakthroughs, institutional changes, or simply pandering to a new niche. All that said, I expect Hillary would be happy to take any position someone paid her for. Bernie would change his opinion once he saw a validated, peer-reviewed study in an independent academic journal, with other researchers having done their own analyses and come up with similar results, and three demonstrated successful test implementations of the plan. (Oops. Sorry. Is my bias sticking out again?)