The idea that policy uncertainty is holding back the recovery does not find much support when tested against actual evidence, but facts have never constrained Republicans in the past and they continue to try to make this charge stick with voters. In fact, Republicans are so desperate to make this charge, they are resorting to criticizing Obama for letting too many regulation expire. This is John Taylor:
The ... chart shows the number of provisions in the tax code that are expiring each year. ... It shows a substantial increase in the past few years in policy uncertainty.
Republicans complain about any new regulation (unless it constrains social behavior they disapprove of), and they complain when regulations expire. Does that mean they think we are at the Goldilocks point where regulation is just right?