LOS ANGELES -

It's the corporate equivalent of high-stakes poker.
   
Tesla Motors has five states bidding to attract a $5 billion factory that will make batteries for a new generation of electric cars. The winner is expected to offer publicly financed incentives exceeding a half-billion dollars.
   
And the package could be far more, because the states don't know what their competitors are offering.
   
So far, Tesla has done initial work on a potential site in Nevada. But the company will prepare at least one other before making a final decision by year's end.
   
That leaves California, Texas, Arizona and New Mexico wondering what they can do to be a finalist.
   
So far, the states have passed tax breaks, promised worker-training funds or proposed shelving environmental regulations that could slow the factory's construction.