Even if the students wanted to support a presidential challenger, the main opposition parties here are still deeply divided and unable to agree on a single candidate to take on Mr. Moi.

The PRI has faced serious presidential challengers before.

The organization also sent the petition to all of the presidential challengers in the 2008 election.

The attacks are not only from the left - the same photo appears on a website run by Republican presidential challenger, Jon Huntsman.

This gesture appears to provide backing for John Kerry, the US Democratic presidential challenger.

The top presidential challengers, meanwhile, continued to cry foul.

Mr. Kerry set a single-quarter fund-raising record for a presidential challenger and gained substantially on his goal to raise $80 million by this summer, according to the campaign.

October 12 - Secretary of State and 2008 presidential challenger Hillary Clinton declares she would not challenge President Barack Obama in the 2012 election campaign.

Mr. Kerry has already raised more than $180 million, far and away the most of any presidential challenger.

Senator John Kerry, the Democratic presidential challenger, has also promised to lead efforts to cancel the debts of impoverished countries if he is elected.