And an excellent, spirited response it is, from Mark Salter:

First, let us be clear about the nature of Senator Obama's attack today: He used the words 'losing his bearings' intentionally, a not particularly clever way of raising John McCain's age as an issue. This is typical of the Obama style of campaigning.

We have all become familiar with Senator Obama's new brand of politics. First, you demand civility from your opponent, then you attack him, distort his record and send out surrogates to question his integrity. It is called hypocrisy, and it is the oldest kind of politics there is.

It is important to focus on what Senator Obama is attempting to do here: He is trying desperately to delegitimize the discussion of issues that raise legitimate questions about his judgment and preparedness to be President of the United States.

Through their actions and words, Senator Obama and his supporters have made clear that ANY criticism on ANY issue — from his desire to raise taxes on millions of small investors to his radical plans to sit down face-to-face with Iranian President Ahmadinejad – constitute negative, personal attacks.

...Today, Senator Obama is complaining about comments John McCain made about a senior Hamas advisor stating that Hamas would welcome Senator Obama's election as president. Indeed, on April 13th, senior Hamas political advisor Ahmed Yousef said, 'We don't mind – actually we like Mr. Obama. We hope he will (win) the election...

The McCain campaign has never suggested that Senator Obama supports Hamas' agenda, but it is more than fair to raise this quote about Senator Obama because it speaks to the policy implications of his judgment.

Just today, the president of Iran, whom Senator Obama wants to meet with unconditionally, called the state of Israel a 'stinking corpse.' Iran is is the paymaster and state sponsor of Hamas.

In his victory speech this week, Senator Obama stated that 'wisdom' is meeting with our enemies, including Iran's Mahmoud Ahmadinejad....