Larry Kudlow
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Fed chairman Ben Bernanke made big news Tuesday by singling out the weak foreign-exchange value of the U.S. dollar as the principal culprit in “the unwelcome rise in import prices and consumer price inflation.”

Are you watching this, John McCain?

Bernanke is signaling a major policy shift on the dollar. In his speech, via satellite to a conference in Barcelona, Spain, he said Fed policy and the underlying strength of the U.S. economy “will be key factors ensuring that the dollar remains a strong and stable currency.”

In effect, the Fed chief is putting a floor under the dollar. But there’s more here. He added that “we are attentive to the implications of changes in the value of the dollar for inflation and inflation expectations, and will continue to formulate policy to guard against risks to both parts of our dual mandate, including the risk of an erosion in longer-term inflation expectations.”

The Fed head has finally figured out that the weak dollar is driving up inflation. He’s also reaffirming the Fed’s traditional priority of generating price stability. In the process, he may be restoring an inflation-targeting policy that has been badly undermined of late. Hopefully this means the central bank will go back to using forward-looking market-price indicators, such as the dollar and gold, in its policy decisions.

Bernanke’s comments follow on similar statements made by Fed governor Kevin Warsh, Dallas Fed president Dick Fisher, and Minneapolis Fed president Gary Stern.

And they mark the first time in his tenure that Bernanke has explicitly discussed the dollar-inflation connection.

Now, Treasury-man Hank Paulson in recent days has been talking about the dollar. But he still frames the discussion in terms of a strong dollar being in the national interest. Unfortunately, that phraseology remains a euphemistic reference to the Bush administration’s long-held policy of dollar neglect. Not until Mr. Paulson uses the new Bernanke language -- “that the dollar remains a strong and stable currency” -- will we know the White House is shifting gears to King Dollar. Even better, Mr. Paulson could use the term “dollar appreciation.”

But without question, Bernanke would not have changed his language unless he got a signoff from Paulson. So these new statements are the most hopeful sign yet that U.S. financial bigwigs are starting to get their arms around the greenback.

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Larry Kudlow

Lawrence Kudlow is host of CNBC’s “The Kudlow Report,” which airs nightly from 7 p.m. to 8 p.m.