rosalind p. walter. barbara hope zuckerberg. corporate funding is provided by mual of america-- designing customized individual and group retirement products. that's why we're your retirement company. ditional support has bee provided by: an by the corporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, hari sreenivasan. >> sreenivasan: good evening and thank you for joining us. some of the f.b.i. reasons for the surveillance of former trump campaign advisor carter page came public over the weekend, and this morning was filled with reactions. the heavily redacted documents include applications from the f.b.i. to the foreignll inence surveillance court, or "fisa court," which oversees approval of surveillance warrants. starting in october 2016, the fisa court approved multiple warrants to surveil page, who the f.b.i. suspected was "...an agent of a foreign power"...