Naturally this pleases Obama because it keeps the official unemployment rate artificially low.
Via Breitbart:
On Friday, the Labor Department reported that 720,000 Americans left the labor force. This exodus pushed the labor force participation rate down to 62.8%, the lowest level since 1978. One out of three adults in neither working nor actively looking for work.
Some observers attribute the sharp drop to the shutdown and the furloughed federal workers. Even if that were the case, and it is unclear why these workers would be counted as not in the labor force, the number of Americans exiting is still significant.