Discounting geopolitics is dangerous, but the current selloff is more about two specific factors: a shift in expectations towards an outright Fed hike (which he personally thinks may be overstated) and the upcoming SpaceX IPO. Markets have been overpriced for a long time.
He argues you don't hike rates because unemployment is too strong, only if inflation gets out of control. He notes Trump's stance against a hike. He also highlights the risk of passive funds being forced to buy SpaceX at any price.