Did Hillary Clinton learn it? Of all the people in the world, she's probably the one who had the most incentive and motivation to "learn" charisma, if it was possible.
I always got the impression from her public persona that she thought she didn't need charisma, that she had "earned it", and that the power she had accrued over the years should be enough to deliver the victory to her.
I think it's possible to learn it, but a lot of charisma comes from empathy and focus on others. Awkward people can be very charismatic if they give the vibe they care about you. True selflessness isn't something most politicians are really known for..
