because they have to find something to piss and moan about

After complaining that health care bills were too long, Boehner now complains that Obama’s is too short.
(Think Progress)
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Of course, as Rachel Maddow pointed out, the brievity actually means that this is simply a list of the items that the WH feels needs to be updated or addressed within the actual bill. But admitting that would simply be too truthful for any repug.