so johnson placed wiretaps on madame chinault and the embassy. they have, and there's what they call "the x-files." i'm not makes that up. it has all the conversations going on to madame chinault, and going back and forth to south vietnam. johnson has his information. he passes it off to humphrey to use it as you see fit. but johnson hesitates to make it public. why? why, jose? >> two reasons. one, he wanted to appear above the politics of the election. second, impose a -- he wanted to preserve the integrity of the presidential office. >> there's something ironic about that. but you're right. i think that's a third one. one, you're right. he did -- he wanted to appear nonpartisan like eisenhower appeared in the 1960 election. here's the third point. he didn't want to have to tell people who his sources were. the president of the united states is using the nsa to spy on our allies in saigon and using the fbi to spy on u.s. citizens, as well as our allies at the embassy. but i think your point is very well made about the idea that he wanted to prot