A new McCain ad asks in its opening line: "Is the biggest celebrity in the world ready to help your family?" Here is "Family":

UPDATE: The Obama campaign has responded to McCain's ad with a statement from an Obama spokesman.

"Is the biggest proponent of George Bush's tired, failed policies ready to bring about change? Another day brings another dishonest attack from John McCain. While Senator McCain knows that Senator Obama has proposed cutting taxes for 95% of American families, what he's not telling us is that he wants to give $4 billion in tax breaks to the oil companies, continue giving tax breaks to corporations that ship our job overseas, and provide no direct tax relief for more than 100 million middle-class families. It's time to retire these old policies and bring new energy to America," said Obama campaign spokesman Bill Burton.