political analyst jean yves camus doesn't believe the attack will drastically impact the outcome of sunday'se-- but has this proviso: >> if there's going to be a benefit, certainly marine le pen will benefit from the fact that this was a jihadi attack. that apparently, what we know this morning, the guy came from belgium or was a belgian citizen, so she will say, "i want to bring back borders." >> reporter: immigration control is marine le pen's signature message. she has sanitized the party in recent years to broaden its mainstream appeal. she replaced her nationalist father as leader, expelled him from the party for his racist and anti-semitic statements; and she watered down the front's extreme right-wing tendencies. >> ( translated ): i'm telling you that what's at stake on sunday-- and i've repeated it tirelessly over the campaign because i believe it-- is civilization. on sunday, the choice is simple: either a france reborn, or a france that founders. i'm telling you that i intend to protect you. >> reporter: but as this brief protest demonstrates, marine le pen's detractors regard her

. >> reporter: but jean yves camus, a specialist in right wing politics, believes that's an illusion.e's no way she can be elected unless of course a huge political earthquake or something really nasty such as a terrorist attack but i see no >> reporter: these national front supporters were partying as if the ultimate prize was a foregone conclusion. but most people headed home early as reality sank in that they have a major battle on their hands if they're to emulate the victories of brexit and donald trump. for the pbs newshour, i'm malcolm brabant in france. >> woodruff: more than a decade- and-a-half into the u.s. war in afghanistan, the country remains wracked by instability. kabul in recent days, just as the taliban reminded the world that it remains a force to be reckoned with. two of the top national security officials in the trump administration have been in william brangham reports. >> brangham: the defense secretary's surprise visit to kabul underscored growing u.s. concerns about afghanistan. secretary mattis made that clear after meeting with president ashraf ghani and ot