Rand Paul does seem to know how to negotiate with Iran which is through China and Russia not directly because we have no ties with Iran. Just asking China and Russia isn't enough we need to persuade them to help us.
I am not sure I can accept your premise that we need or should go thru Russia or China
but let’s say yes....
Russia is mad as hell at USA right now (think: ‘subversion’ efforts in Ukraine) and
China is busy expanding and sees USNavy as its primarly or most immediate opponent
persuading either of them to help us ... seems unlikely at this time
and neither of them trusts Obama one iota
anyway, it would be a nice thing if it were possible....
it just doesn’t look that way
so we need to deal more directly with the problem. in my humble opinion, of course
best,
fhc