isn't the original point about porous border inspite of being a "nuclear nation" ?
my response with examples was that, being a nuclear nation has nothing to do with porous borders. every nation has their own threat perceptions to their national security, when Bush Sr was NSA and CIA chief drugs coming from their south of border were considered a national threat. it's been more than 40 years, they are still unable to control it. in af-pak case political will in traditional sense does not matter because military is the political power in pak, and yet they are unable to prevent infiltration from Afghanistan.
ignoring the rest to narrow down the conversation, since biden and kamala are recent phenomenon, this issue predates them in U.S.