Ross marks Obama's first 100 days:

[Obama's] administration has only just begun to define itself, and things will almost certainly get harder as the shadow of the Bush Administration recedes.  The policy debates for which this administration will be remembered are still ahead of it, and the crises and the defining moments they generate are still to come as well. In a variety of different ways, George W. Bush helped make Barack Obama's first hundred days a ringing success. But he won't be there to help forever.

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