Washington - Alaska Governor Sarah Palin on Thursday said she was confident that she could take over the presidency if called upon, in her first interview since accepting the nomination to run as vice president with Republican nominee John McCain.

Palin, governor since 2006, was little-known nationally until she was named two weeks ago as McCain's running mate. She has faced questions from Democrats about whether she has the experience - especially in foreign policy - to be vice president to the 72-year- old McCain.

Palin said that she "didn't hesitate" when asked by McCain to be his running mate, in an interview with US television network ABC.

"I answered him yes, because I have the confidence in that readiness and knowing that you can't blink," she said.

The Alaska governor warned against another "cold war" with Russia, but suggested economic sanctions might be needed in response to its invasion of Georgia in August.

Palin she supported NATO membership for Russia's neighbours, Ukraine and Georgia, which currently remains occupied in parts by Russian troops. (dpa)