Valerie Jarrett: Michelle Obama's speech was something 'we had never seen before' from her

Valerie Jarrett, former senior advisor to Barack Obama and author of "Finding My Voice" joins Andrea Mitchell to discuss President Trump attacking Michelle Obama today after her sharply critical DNC speech, with Jarrett saying "This was a former First Lady Michelle Obama, frankly, that we had never seen before in terms of the sharpness of her attacks. What we saw today, I think was President Trump really struggling to figure out how to go after her."