The DOJ is giving California counties 48 hours to verify ballots.
Federal authorities have charged 28 foreign nationals in California who authorities said have illegally registered and voted in U.S. elections.
San Mateo County election officials are warning voters after mail was stolen from a Daly City post office, raising concerns that some ballots may have been among the stolen items.
Federal law enforcement officers said they are working to intercept the letters.
Video from a trail camera shows Pacifica City Council candidate Sam Casillas spray-painting over the word "NOT" and replacing it with a heart.
The Supreme Court is allowing states to resume using a controversial federal tool to check voter eligibility before the November elections.