Obama warns fate of world at stake
He said her Republican opponent Donald Trump was a threat to hard-earned civil rights.
President Obama was speaking at a rally in North Carolina.
Mr Trump said Mr Obama should stop campaigning for Mrs Clinton and focus on running the country.
“The bottom line is, no-one wants four more years of Obama,” he told supporters in Pensacola, Florida.
He said Mrs Clinton had become “unhinged” in recent days.