Lol iran is a little boy infront of pakistan, no way the Us can or ever dream of countering let alone checkmating pakistan with iran, there are duels between nuclear powers, the big boys, iran has no seat and doesnt even have the balls to secure a seat at the big boys nuclear club...
How will iran acomplish that, the only influence they have in afghanistan is on the northern alliance minority govt in pakistan which usa backs but the majority pashtoon population is firmly in pakistan's grasp couoled with our assets on the ground aka the talibans who are winning the war in afghanistan, even the Us couldnt neutralize pakistani interests in afghanistan and ur proposing iran the boy will..
"Why would russia be enemy of Us", people dont bother replying to this guy he is a wet kid with absolutely no knowledge of geopolitics..
Iran has oil and the money associated with it.
Iran has land route to Afghanistan and a means of supplying Afghans with weapons.