Some people are afraid that Dean can't compete with Bush on security and foreign and policy. That ridiculously overestimates Bush. Don't underestimate Bush, but don't be groundlessly afraid of him either.
How do you think Dean got to be the Dem front-runner? Has everyone forgotten his stump speech? He got where he is precisely by going smack up against Bush on security and foreign affairs, namely on Iraq, on regaining the trust of our allies, on container inspection, on buying ex-Soviet nuke materials under the CTR treaty, and of course on the ultimate national security issue which is the economy.
Never forget either that the economy is the basis of all security. You might remember that Soviet Union too. It was once our biggest national security threat--we had a cold war for decades--but it fell to pieces because its economy collapsed the way Bush is making ours collapse. Even if Bush ran foreign affairs perfectly, which he does the exact opposite of, his mishandling of the economy is the gravest national security threat we could possibly have. Dean can run on that.