Iran''s supreme leader bestowed his formal endorsement on Mahmoud Ahmadinejad''s second term as president on Monday but withheld a powerful symbolic gesture — the kisses and close embrace that portrayed their bond four years ago.

The awkward and halting moment came when Ahmadinejad leaned forward to kiss Ayatollah Ali Khamenei. But the supreme leader raised his left hand and momentarily stopped Ahmadinejad, who spoke a few words and then kissed Khamenei''s robe.

The uneasy body language reflected much of the political tension and collateral damage since the disputed June 12 election sent Iran into its worst internal unrest since the 1979 Islamic Revolution.

Ahmadinejad limps toward his next four-year term as a hugely polarizing figure: backed by the Islamic system but scorned by millions of opponents who claim the vote was rigged. Khamenei, meanwhile, has been rattled for the first time by protesters questioning the near limitless power of the theocracy he controls.