Voters in Kansas City — the largest city in Missouri and the sixth largest city in the Midwest — overwhelmingly approved a ballot measure on Tuesday to reduce the city's penalties for marijuana possession. The Kansas City Star reports: The measure lowers the maximum fine for marijuana possession in city court to $25 from $500 and eliminates jail time as a penalty. Under the old ordinance, a sentence of 180 days was possible. The change applies only to cases in Kansas City Municipal Court in which…