What percentage of eligible voters do you think are unreachable for the Democratic Party? [View all]

Without the Democratic Party abandoning its base, there is a portion of the electorate that simply can't be reached by the Democratic Party. I would think virtually all of us could agree on that. Especially given the sorts of nonsensical things so many Americans believe.

Keeping in mind that ~40% of eligible voters don't vote in presidential elections, what percentage of eligible voters do you think can't be reached by the Democratic Party? In other words, what percentage won't vote Dem no matter what?

0-9?
10-19?
20-29?
30-39?
40-49?

And what percentage of Trump voters weren't going to vote for Clinton no matter what?

0-20?
21-40?
41-60?
61-80?
81-100?

Personally, I'd say 30-39 in answer to my first question, though I'm tempted to say 40+. And I think the answer to my second question is "damn near 100."