Bear markets happen more often than many realize, and most people will have to navigate multiple severe downturns during their investing years 

“The Federal Government cannot continue to spend more money than it takes in.” - Jimmy Carter (1978)

Lower energy prices were keeping US inflation rates from rising

This remains a well-hedged market at the index-level, per Morgan Stanley

Trump may have pivoted on what was initially described as a battle that could be fought against Iran "forever" because the economic implications are not only undesirable, but his approval within the economy is already quite low