Your ballot or other mail may not get postmarked by USPS the day it’s dropped off NPRVoter turnout exceeds expectations in California’s Prop. 50 special election Los Angeles TimesCA special election: How a USPS mail service change may delay ballot returns for rural voters KCRADoes early voting data on CA Prop. 50 provide a hint at whether it will pass? Sacramento BeeHow to vote in California’s Nov. 4 special election on Prop 50 San Francisco Chronicle