Bill Clinton lost 9 of the 10 primaries. That of which solidifies a presidential candidates moment is different for everyone.
Reagan’s moment was a speech he gave at a bay where he stated “ a new dawn in American.”
George H.W’s moment was at the RNC, where he stated“ read my lips, no new taxes.”
Clinton’s moment was playing his saxophone as a guest on the Arsenio Hall show.
George W. Bush never had a moment the election was stolen from Al gore.
Obama’s moment was his famous DNC speech.
Frankly; none of the candidates have had this all encompassing moment that pushes forth a massively unanimous coalition. Yang like the others have great talking points that motivate and inspire, but all far short; as of now, to the greats.