A fan of McClintock throws cold water on the idea:

Tom McClintock is without doubt the best conservative, and the best Republican in CA. It would be a complete waste of his skills to go to DC as a congressman. He is needed here as governor. No politician better understands the ins and outs of the CA budget, and what it takes for conservative ideas to prevail here. He is the antidote to Schwarzenegger, who in the last 18 months has embraced most of the policies he ran against during the recall.