How many members of the US Congress are research scientists?

Answer 1

I know of only one. His name is Rush Holt, a Democrat from New Jersey. He was a research physicist.

Answer 2

Good question. I think that I read that there were something like 3-5 serving in Congress. Unfortunately, I cannot locate that source again.

Anyway, one of them is Dr. Roscoe Bartlett (R, MD-1). He did research for the National Institute of Health, among other places. Per his biography,

"He holds the basic patents for rebreathing equipment which recycle the oxygen from exhaled air in closed systems. This technological advance extends oxygen supplies and makes them portable. Bartlett’s inventions are critical components of the equipment that supplies oxygen to astronauts, pilots, and fire/rescue personnel."

Answer 3

Probably none, why? do you think you have to be a research scientist to understand what they are doing in research.