The fact remains that the "recovery", if it can even be called that, has been weak and uneven. Both parties are to blame for that.
We could be doing much more to stimulate the economy, but the lack of consensus combined with GOP intransigence toward anything the Obama administration proposes, leaves us adrift and rudderless like a ghost ship. (How's that for a metaphor?)
Any alleged "gains" can be accredited to broader macroeconomic forces which themselves are endangered by the situation in Europe. So neither side can claim to have actually "done" anything to improve the economy.