It's possible that he thinks a reformist President would be more productive for Iran in negotiations with Obama.
First--here's a detailed interpretation of Khamanei's response to Obama's Nouruz message last month. :
http://icga.blogspot.com/2009/03/on-khameneis-response-to-obama.htmlThe speech was quite long, first dealing with domestic affairs and focusing mostly on the need to curb the consumption of resources. But it gets interesting around minute 40 when he explains why his public support for President Ahmadinejad should not be construed as support for him as a candidate in the next presidential election. This is of course a big issue for Iran’s domestic politics and the fact that the leader himself had to address it was significant since Ahmadinejad supporters are working very hard to give the impression that he is his candidate.
You may remember Obama's message,
http://www.whitehouse.gov/nowruz/Bush also issued New Years greetings. From 2008:
http://american-iranian.org/publications/articles/2009/03/president-bushs-2008-nowruz-message.htmlMany people consider Obama's message a significant departure from Bush's nowruz greetings for two reasons.
He referred to the government as the "Republic of Iran" instead of as a "regime" suggesting that Obama considers the government to be legitimate.
Secondly, Obama does not use wedge language to criticize the government in front of the Iranian people. Bush and Kerry more recently used language that differentiated between the people and the government. This language is seen as an attempt to encourage dissent.
(
http://anthonyzeitouni.com/modules/news/article.php?storyid=9 for more discussion on this)
Now, why might Khamenei not publicly support Ahmadinejad in the June election?
Here's an interesting (and optimistic perhaps, but I am an optimist) editorial from the Guardian yesterday
http://www.guardian.co.uk/commentisfree/2009/apr/06/iran-nuclear-powerUntil now, the supreme leader has offered unprecedented support to Ahmadinejad. However, new events on the ground may mean that for the next elections, matters may not be entirely in Khamenei's hands. The election of Barack Obama and his offer of unconditional talks with Iran have created new challenges for the supreme leader. With such a popular president at the helm in Washington, shunning America could be a costly mistake.
Khamenei realises that during the expected negotiations, Obama would prefer a reformist resident of the presidential office in Louis Pasteur Street in Tehran. This is why he is waiting to negotiate with Iran after the Iranian presidential elections. He does not want to improve Ahmadinejad's chances.
Although the supreme leader is under no obligation to compromise with Obama, shunning the US president would be damaging, both diplomatically and economically. Realising that the re-election of Ahmadinejad may be interpreted as a rebuff in Washington, it is very possible that Khamenei may decide that Ahmadinejad's removal may serve his interests far more than keeping him as president.
What will Obama do.
What would you do?
In his campaign, Obama repeated many times that his negotiations with Iran may not be done through Ahmadinejad. So Obama has made it clear that he doesn't consider Ahmadinejad the most useful player in negotiations. Khamenei is really smart. The response to Obama's Nouruz message show that. The reformist candidate Mousavi sounded a few degrees more sane than Ahmadinejad in a recent press conference. (
http://www.democraticunderground.com/discuss/duboard.php?az=show_mesg&forum=132&topic_id=8324926&mesg_id=8324926)
But should Obama try to influence the June presidential election, or should he save his major overture for later?
The state department is supposed to have a major review of Iran completed in May.
I think we'll see something between then and the June 12th election addressed to the Muslim world, not Iranians particularly.
Here is a discussion on this from March 11th:
http://www.boston.com/news/nation/washington/articles/2009/03/11/us_may_soon_make_overture_to_iran_leader/The Obama administration is leaning toward making a major diplomatic overture to Iran before the country's presidential elections in June. This initiative could come in the form of a letter from President Obama to Supreme Leader Ayatollah Ali Khamenei, according to two senior European diplomats who have met in recent weeks with key State Department officials crafting a new US policy toward Iran
In the mean time, UN diplomats are meeting in London today to discuss how to move forward with Iran on the nuclear issue, which should make an interesting backdrop to tomorrow's official Iranian "nuclear technology day," during which Ahmadinejad will make provocative statements about the progress of their nuclear energy program.
edit--left off a link