You might find this especially interesting. We've taken Gallup's presidential approval ratings from Ike to Barack and lined them up against each other
over the first 22 months of their respective presidencies. It allows you to see how Obama stacks up
against each of his post-war predecessors at the comparable point in time in their presidencies. Here, for example, is Obama versus Reagan (click for larger version):
(Special thanks to TPM poll fellow Jon Terbush).