WASHINGTON —As the United States continues to see election-related violence and lawsuits challenging voters’ eligibility, a democracy watchdog group is aiming to make sure voters are protected when casting their ballots. A week ahead of the presidential election, in which Vice President Kamala Harris and former President Donald Trump are vying for the Oval Office, the nonpartisan group Common Cause is gathering volunteers across the country to assist Americans in voting without obstruction. “Right now, we’re seeing litigation ranging from challenging voters’ eligibility, to challenging their c…