This is why I think appeals to "centrism" and similar are pointless/unnecessary in this cycle. Even the Democrats that like to think of themselves as "moderates" or whatever (typically the older ones) are fine with the GND and Social-Democrats and Progressivism... you name it, as long as it defeats Trump. So the key to winning is to inspire the less-likely voters to get psyched about voting and emotionally committed to voting. The "moderate" Democrats are going to vote for the nominee no matter who it is.
Any person who considered themselves "centrist" made up their mind about Trump, once and for all, a long time ago.
Nothing is changing their mind at this point. You're either voting for Trump, or you're not... and if you are still claiming to be "undecided"
about voting for Trump (WTF
) then I'm handwaiving you (the royal you) as being dishonest, even if only to yourself.
For anyone who knows they aren't voting for Trump, the only remaining question is whether you're motivated about someone enough to get up, go out, stand in line, and vote for them. For moderates who aren't voting for Trump, that question is already set in stone. They're voting regardless, and they're voting for Trump's opponent, regardless. Democrats need to focus the lion's share of the effort on the folks who are feeling "Meh" about voting.