“Traveled in open car”—In those days Presidents traveled in OPEN cars to be “close to the people”. See old films of Roosevelt, Truman, Eisenhower- They all “paraded” that way. Kennedy when walking, would walk up to the barriers and shake the crowds hands.
And the odds caught up with JFK.
There was a lot of hostility in Dallas and Texas for Kennedy. They were tempting fate and JFK lost.
A trip to Chicago by JFK was cancelled only weeks before.
The Omen in Chicago: the I-Team has discovered not just one, but two plots to cut down JFK in Chicago in early November, 1963, and an intriguing backstory of bungling by the government agencies protecting him.
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An hour later, the White House scrubbed JFK’S trip.
“Since the president’s life was in such severe danger, that was the reason he cancelled the trip to Chicago— the assassination threat,” said Bolden. “
http://abclocal.go.com/wls/story?id=9315215