getting caned on the senate floor. this is part of i think american story, right in there s violent past. you re trying to sell john meachum s book quite well. sure, but the only thing that i think is different in this climate is that we ve commercialized that kind of dissent. you can sell books off it, you can get ratings off it. you can raise money off it. the commercialization of extremism is new. that is a great thing to stop this segment on. that s a great point for people to think about it. that bothers me a lot. people that have commercialized their outrage. anyway. roger, john, thank you both. up ahead, which senate seats are most likely to flip come november? we re going to show you our brand new nbc news flipability rankings. rankings thanks to the dedicated technicians at the american red cross. who worked with vmware. to develop technologies to help redirect the flow of blood