WASHINGTON (AP):

By claiming that Democrat Barack Obama is "palling around with terrorists" and doesn't see the US like other Americans, vice-presidential candidate Sarah Palin targeted key goals for a faltering campaign.

And though she may have scored a political hit each time, her attack was unsubstantiated and carried a racially tinged subtext that John McCain himself may come to regret.

Palin attack shows

First, Palin's attack shows that her energetic debate with rival Joe Biden may be just the beginning, not the end, of a sharpened role in the battle to win the presidency.

"Our opponent ... is someone who sees America, it seems, as being so imperfect, imperfect enough, that he's palling around with terrorists who would target their own country," Palin told a group of donors in Englewood, Colorado. A deliberate attempt to smear Obama, McCain's ticket-mate echoed the line at three separate events Saturday.