Prep Going News Today

Campaign events like this recently. even with intense prep sessions, this format could bring challenges. >> both candidates have to tread lightly because if they are going on the offense too aggressively with each other, that can spill over to the audience and make them look too >> reporter: president obama was widely criticized afterh adjustment >> i think hes going to be aggressive in making the case for his view of where we should go as a country. >> reporter: both candidates spent the weeken...

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