"From northern Michigan's iron mines to Pennsylvania's natural-gas fields, the industrial heartland of America is humming with jobs again as a region once left for dead recovers faster than the rest of the U.S.," Bloomberg reports.

"The turnaround may shape this year's race for the White House as President Barack Obama seeks to reverse Republican gains in the Midwest... The economies of Michigan, Indiana, Ohio and Pennsylvania -- all states Obama won in 2008 -- have improved faster than that of the U.S. since the recession's depth in April 2009, according to the Philadelphia Federal Reserve. Michigan is expected to lead all 50 states during the next six months."