An undervalued Chinese yuan remains a contributing factor to the U.S.-China trade imbalance, but experts warn that labeling China a "currency manipulator" will not rein in mounting U.S. deficits.

The U.S. patent system has generated growing debate over whether it helps foster innovation or stifles it through unnecessary protections, as this Backgrounder explains.

Trade accounts for an increasing portion of the U.S. economy, and the Obama administration has embraced a ramped up export strategy. But debate persists over the merits of a vigorous free trade agend…