This was a pre-planned military style ambush two months in the making. This was an assignation. The perp knew about the charity baseball game and the practices but he was exactly sure of when the practices took place but he did know where. He knew that practice would be the best time to make the hit. So he camped out at the target zone and waited.
Yes, it was clearly a planned assassination.
It completely backfired, as assassinations often do.
The shooter has done more to discredit the left than the entire Republican Congress for the past six months.
Over the last 50 years, the establishment media was able to turn most assassinations into a political narrative that they controlled. They no longer have the power to do that.