including the u.s. ambassador. >> that the president the day after that happened flies to las vegas for a political fund-raiser. >> and the suggestion that anybody in my team would play politics or mislead when we've lost four of our own, governor, is offensive. that's not what we do. >> reporter: that fight is likely to spill over into next monday night's debate. their final showdown, rob and paula. that one will focus exclusively on foreign policy. >> maybe that libya moment kind of foreshadowed what we'll see monday. that's for sure, karen. what was different about this debate compared to the first time around? >> reporter: that noticeably stronger tone. you had both president obama and mitt romney really going after each other. you know, we heard so much after that last debate that president obama was too passive, his performance was too lackluster,