The White House said the president and first lady would not participate this year, “to allow the honorees to celebrate without any political distraction.”
Amid heightened tensions, a handful of cities were preparing for demonstrations this weekend over Confederate symbols and white nationalism.
Although Stephen K. Bannon lost as often as he won in White House debates, his departure could tip the balance on trade, climate, China and Afghanistan.
The suspect, who was shot after the attack, is an 18-year-old Moroccan. Four others have been arrested, and an international warrant is out for a sixth suspect.
The authorities believe that Younes Abouyaaqoub may have been the driver of the van that mowed down people in Las Ramblas.