Songbob: "That is, if you're crazy enough to be shouting and spraying your elected representatives, you probably shouldn't be out in public. It speaks ill of your upbringing, and ill of any side that promotes it."

I watched you video link several times, carefully...and it does not appear that the protester was spitting at the congressman. Though, I can understand that people would want to claim differently, depending on your pre-disposition, of taking sides. Never in the video does the protester fill his mouth with a breath or anything like that to propel any intentional spit. Look closer, with an mind for impartial observing.

Then, let it go.

GfS