Tesla sales are down, its stock prices are slumping and the Elon Musk-led electric vehicle company has just lost another previously satisfied customer in the U.S. Senate: Mark Kelly of Arizona ...

The state invested $829 million in Panasonic plant to make electric car batteries, but politics threatens its success.

Eager to capitalize, Gov. Kelly brokered a deal with Panasonic to build a massive $4 billion lithium-ion battery plant in De ...