i m ari melber. here is how you know we re in new territory in this year s midterm home stretch. look who it is. barack obama will be visiting, georgia, michigan, wisconsin, today adding nevada. the former president is the surrogate most in demand in his party right now, but there are other names who we know can galvanize crowds like this. you re looking at some of the large young and often diverse crowds that we saw gather for bernie sanders on his campaign trail. you see this is him out back on the presidential primary. i want to give you the context of why some democrats are excited about this announcement. when you look at crowds like that in so many parts of the country, bernie announced today he ll hit eight states for 19 events in this last stretch. the 81-year-old showing his stamina. meanwhile republicans siamak crow trends they think can matter far more than any surrogate or any big crowd. massive economic problems continue to top voters minds. forecasts favor repu