It's hard to overstate the extremity and variety of pressures bearing down on President Trump and his understaffed White House.

The bottom line: Taken together, it's a jaw-dropping list of problems, and Trump's "fine-tuned machine" is creaking under this stress. We're at a hinge point in the Trump presidency, and staff sound as unsettled as I've heard them in the 19 months since he took office.

What Trump is facing: