New Mexico Governor Bill Richardson says time has come for Democratic presidential candidate Hillary Clinton to wind down her campaign.

During an appearance on Fox News Sunday, Richardson said the former first lady has to realize 'this bloodletting that would go between the last primary and the convention is not serving us well'.

"Obama has won 30 states. I think he is going to take many of the 10 states that are remaining. He's got a delegate lead. He's picking up in superdelegates," said the governor who is a prominent supporter of Democratic frontrunner Barack Obama.

Richardson added that although Senator Clinton runs a magnificent race, "the reality is that proportionately, numerically, I don't think Senator Obama's lead can be overtaken."

As the two candidates have been at each other's throats to get on top of the Democratic poll, there is much speculation as to whether the Dems will have enough left in themselves to capture the presidency in spite of efforts being made by Republican nominee-in-waiting Senator John McCain.

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