Here's how the $37-billion Fiat Chrysler-Renault merger went into the ditch

Shortly after 9 p.m., as the sun began to set on the rotund glass facade housing Renault's headquarters on the outskirts of Paris, the board called a break. The group had gathered for the second time in as many days to sign off on a proposed merger with Fiat Chrysler Automobiles. As the talks dragged...