I was surprised at the 24mm focal length. He had to be close or the picture cropped a bunch.
I was too, but then digital lens measurement is a different ballpark, and I'd say complicated, because there are multiple approaches to coming to grips with the difference. But in the end, 24mm on a professional digital camera is probably a reasonable choice in that situation.
That aside, I've gotten several cogent and reasonable responses to my claim that the fast speed was odd, telling me it's not out of the ordinary. But the bottom line is still that had the Trump/bullet trail photographer wanted the best quality shot without considering the bullet trail, he would have used 1/1000th of a second; 1/2000th of a second tops if he was afraid of some transient glare. A shutter speed two to three stops faster than that is a sacrifice of quality any way you slice it.
On the other hand, the photographer, pretty close to Trump as you mentioned, using a seemingly wide-view lens, was by the same token not very far away from the line of fire. Likely a greater angle than the people that were hit, but still ...