Show of Hands

Ideally, I would like a president, or any public official to have a decent amount of knowledge on a wide range of areas,

Equally as important, is enough self awareness where they know when they approach the limits of their knowledge and call in someone to further educate them on a particular topic when needed, the simple fact that Mr Trump ignores his intelligence briefings is a strong indicator of his lack of this kind of self awareness.

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It's important that a president understands economics.
To know "a lot" would make him/her an economist. That isn't required. Advisors fill that role.

The economy is absolutely crucial for any country. Being well versed in economics is a big asset for a president.

Well, Trump is fortunately well versed on economics but I don't think every president has to be as knowledgeable as him. That's what they have advisers for.

I mean, I thought so, but apparently not. Apparently they also dont have to not sexually assault women. Or have more foreign policy experience than the spice girls. Or not get sued and settle out of court suddenly for exorbitant sums for racial discrimination and fraud