Ahhh, Trump: it never gets old. We're stuck with this for years.
But to answer the thread's question:
When faced with the one, unpredicted, novel problem that required leadership, he ducked - and I mean under the table, problem? what problem? - ducked. It's that simple. The rest is detail**.
Had he had half a brain and just one or two vertebra in his spinal column, he'd be 2-term Donald.
It's truly mind boggling that he even came close.
** details like compulsive liar, self-obsessed, that sort of thing.