McCain moves ahead of Obama in at least one poll

Republican presidential candidate John McCain jumped slightly ahead of rival Democrat Barack Obama

among US voters according to a new poll, benefiting from his party's convention and a rousing speech by his vice presidential pick Sarah Palin.

Palin electrified the party's base at last week's Republican National Convention, but still faces a major test this week when she gives her first nationally televised interview since McCain chose her as his running mate, instantly elevating the little-known politician to national status. (AP)