Honestly, I wouldn't say this, but it's been going on for months now. Sanders supporters are very passionate, and have been overly optimistic (sometimes to the point of denial) over Sanders chances, but in terms of policies and political analysis, most Sanders supporters have been reasonably (or at least largely) rooted in fact and haven't been denying reality. There's many notable exceptions, but I'm speaking in generalities.
Contrarily, Clinton's supporters, again speaking in generalities, as the months have gone by are sounding more and more like conservatives --and not just in their own open disdain for people supporting liberal/Leftist policies, but also in simply refusing to look at the numbers and see where they stand. Look, I've seen it more and more as the months go by. They are turning into a pretty bizarre lot, and if they let this go much farther, they keep in standing a worse and worse chance in November. As much as I dislike Hillary, I don't want Trump in office. (I'm not going to vote her unless she changes her tune at least partially, but that's a separate discussion that I'm having on
another thread.)
To make this a little more precise, Hillary, her mouth pieces, and her average supporters seem to have a narrative that in their group they've determined is true, and you start to see all of these general themes:
1.) Hillary's status quo/sustained neoliberalism is the future of the Democratic party.
2.) The only people who matter in an election are Democratic loyalists.
3.) The only thing needed to secure the Democratic party's victory in 2016 are Hillary loyalists.
4.) Bernie supporters are largely crazy people (Possibly sexist? Maybe racist?), and we don't want them in our party.
5.) We all want a progressive future, but we just can't have that right now, so it's important that we election someone who is a realist and won't try. That's very important, or that future progressive dream will never happen.
6.) Therefore, people who want to fight for a progressive future are really just setting progressivism backwards. We just need to take the current system we have and tweak it a little. Be loyal, and we'll succeed in the future.
7.) Republicans are evil, vicious monsters, and anyone who is against Hillary is probably a closeted Republican or, at the very least, is aiding and abetting them. The way to avoid this is to be a loyalist.
8.) An important reason why Hillary can't just give us the progressive dream, is because even Barrack Obama had Democratic opposition when he tried to implement Obamacare. If even Democrats are fighting us, how can we succeed?
9.) Remember, all we need to do is get rid of Republicans to have our progressive dream. This is why sometimes we have to take money from Wallstreet/Big Oil/etc; it's the reason why Hillary has to take that money is to help other Democrats bid for political positions. See, she's a loyalist, and loyalists are good.
In short, it's positively Orwellian, and unless someone pops their bubble, they keep on increasing the likelihood of a Trump presidency. Some of it is just fanboy/fangirl thinking and they're purposefully overlooking negatives, but some of it is just the right recipe for a Trump presidency.