Sarah Palin blamed by the US Secret Service over death threats against Obama

Sarah Palin's attacks on Barack Obama's patriotism provoked a spike in death threats against the future president, Secret Service agents revealed during the final weeks of the campaign.

The attacks provoked a near lynch mob atmosphere at her rallies, with supporters yelling "terrorist" and "kill him" until the McCain campaign ordered her to tone down the rhetoric.

But it has now emerged that her demagogic tone may have unintentionally encouraged white supremacists to go even further.

The Secret Service warned the Obama family in mid October that they had seen a dramatic increase in the number of threats against the Democratic candidate, coinciding with Mrs Palin's attacks.