Good instinct, bad linkage on Iran-Afghanistan

Ignatius piece in WAPO that starts out promisingly:

Iran is signaling that it wants to join regional efforts to stabilize Afghanistan -- presenting President Obama with an interesting diplomatic opportunity. He had solicited just such help from Tehran last month, but the administration has not yet responded to the Iranian feelers.

And then replays past mistakes:

U.S. policy is still in flux, but the administration appears ready for a limited dialogue with Iran about Afghanistan, perhaps conducted through the two countries' embassies in Kabul. This position has not been communicated to the Iranians, in part because Washington is waiting to see whether Iran will return soon to negotiations about its nuclear program with the "P-5 plus 1" group.

Thus we see yet again what our mania with nukes costs us in the Long War.  Sadder still, but telegraphing our conditions in such a rote fashion, we cede all initiative and put Tehran in the driver's seat on both scores.

Unimpressive.