It is an exciting day for Paul Krugman! His views have been endorsed by David Frum, who according to the Great One, has "wandered off the conservative reservation." That Krugman would go ga-ga over an endorsement from Frum is quite interesting, to say the least.
Frum is a hardcore, war mongering "neo-conservative," better known for his drum beating for the various U.S. wars in the Middle East. Furthermore, Frum always has been of the school of thought that wars are "good for the economy," and his main criticism of the U.S. Government has been that it is not invading enough countries, killing enough people, and taking away enough of our liberties at home.
On the economic front, Frum always has lived on the Keynesian reservation, and his viewpoints have been well-known for a long time. That a Keynesian would endorse the views of a Keynesian hardly is surprising.
So, by all means, if someone like Frum wants to endorse Paul Krugman, perhaps it speaks more to the kind of world Krugman wants us to inherit than the rightness or wrongness of his views.