Brief description of what you observed
Was a very large wasp when compared to some nearby honey bees.
Large orange and black wasp observed several times (finally got a picture), always on swamp milkweed blooms.
On Canada goldenrod
the wasp, not the bumblebees
Sphex ichneumoneus, known commonly as the great golden digger wasp or great golden sand digger is a wasp in the family Sphecidae. It is identified by the golden pubescence on its head and thorax, its reddish orange legs, and partly reddish orange body. This wasp is native to the Western Hemisphere, from Canada to South America, and provisions its young with various types of paralyzed Orthoptera.