US Democratic presidential candidate Kamala Harris has vowed to be a president for all Americans as she formally accepted her party’s nomination on Thursday. “I will be a president who unites us around our highest aspirations. A president who leads and listens. Who is realistic. Practical. And has common sense. And always fights for the American people,” she said on the final night of the Democratic National Convention in Chicago. “With this election, our nation has a precious, fleeting opportunity to move past the bitterness, cynicism, and divisive battles of the past. A chance to chart a new…