LOS ANGELES — California's plodding, weeks-long tally of mail-in ballots has become Exhibit A in President Trump's campaign to delegitimize the November midterms. Why it matters: Glacial vote-counting in the nation's most populous state has produced a familiar, flammable ritual: Late mail piles up, officials plead for patience, and early Republican leads slowly vanish. Democrats and election officials say the long wait is the price of counting every legal vote, including mail ballots postmarked