By Mark H. Anderson
from The Wall Street Journal

WASHINGTON — The U.S. Supreme Court ruled unanimously against Philip Morris Cos. in its bid to move an Arkansas class-action lawsuit over the marketing of light cigarettes from state to federal court.

The opinion overturns a lower court ruling that had sided with the tobacco giant. The lawsuit, which has not yet been to trial, will now go back to lower courts and will likely be heard by a state court.

Philip Morris, a unit of Altria Group Inc., has been trying to get the case moved out of the Arkansas courts. Corporations prefer the uniform and sometimes tougher standards …