The US economy seems to be slowing. In April, employment numbers only increased by 115,000.
Due to population growth, the US economy needs to put on about 200,000 to 300,000 jobs a month, just to keep unemployment constant. Steady employment growth is something that has eluded the US economy for the last five or so years.
Slowing employment won't help Obama. The US economy is in trouble, despite four years of the hopey-change presidency.