latehile, relatively donald trump endorser scott walker says he will not appear with his party's standardbearerriday when donald trump rolls into green bay. mark, clearly, there will be more republicans backing clinton in the coming weeks, we know that is true. at what point does there get to be a critical mass that has an actual impact on the race? mark: at the state level. yes, the national people like meg whitman will get attention. there may even be more members of congress. but it is people at the state level that can impact the race. respected state officials, the clinton campaign will be sure to aggressively highlight them. they have a huge operation to promote news in battleground states. i think we are nowhere near tipping point, but we may get to one if donald trump has a bad first debate. i don't think there will be huge tipping point before then. john: those things all matter. i tell you what. i would bet a lot of money that between now and november we will see an event orchestrated by the clinton campaign that is going to have a dozen or more diehard republicans, military people, f