Sarah Palin berated the U.S. administration for focusing on adversaries rather than its allies. Former US vice-presidential candidate Sarah Palin has spoken at the first US Tea Party convention, urging a return to conservate principles.

Speaking in Nashville, Mrs Palin called President Obama's 2011 budget "immoral" and said it would raise the US debt.

The year-old Tea Party movement includes many people who oppose Barack Obama's plans for healthcare reform and the president's stimulus package.

Mrs Palin said future generations would pay the cost if spending was not cut.

"It's easy to understand why Americans are shaking their heads when Washington has broken trust with the people that these politicians are to be serving," she told the convention.

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