Being called all across the country for their support of truchl trump. and it's often the first question at the debates in the faceoff for the wisconsin senate. >> starting with senator johnson do you stand 100% behind your party's nominee, 100%, yes or no, and why? >> certainly supporting somebody who is going to change washington, that is what i want to do. i support the agreements, but i've not been shy about disagreeing with our candidate, our nominee. so i'm not going to defend the indefensible. >> and a treat for me, msnbc's kelly o'donnell joining us. >> we have an e-mail relationship, ...