it's a trial and lawyerror. yet they prey off of each other and build on each example before them and each creates a new example to follow. there no rules. are there boundaries? >> there boundaries. there is always a tension about how politically involved the first lady can be. what are you talking about when we can't see you? from the basketball and we read in varying books from presidential advisers themselves, this is the person who sees them first thing in the morning and last thing at night. there is always an interest in whether the first lady's goals and the stories about whether her goals and ambitions are the same as the president's. if they are running in synch and if she is reflecting the administration. most good first ladies have been able to dove tail their interests with the administration's interest who were happened and glove with the president to put forward the administration's goals with her as a part of that administration. >> we will talk more about how these four first ladies individually