One of the most dramatic and chaotic presidential campaigns in modern U.S. political history was dealt another shocking development, when members of the Secret Service engaged what law enforcement described as a rifle-wielding potential assassin near former President Donald Trump on Sunday.

The full political impact of the incident — which came just two months after Trump was wounded by gunfire at a Pennsylvania rally — will come into focus as additional details are made public.

But the eruption of gunfire at the Palm Beach course while Trump was playing golf could once again reset a presidential race being fought on a razor’s edge — and help Trump turn the page from a bungled debate against Vice President Kamala Harris that had given the Democratic nominee the momentum.