The Democratic National Committee announced Wednesday that would-be presidential nominees have until Sunday at 6 p.m. to declare their candidacy. So far, only Vice President Kamala Harris has put her hat in the ring to seek the nomination in the aftermath of Sunday’s announcement that President Joe Biden would not seek a second term. The Associated Press reported that the new plan and deadline was approved by the Democratic National Convention rules committee via an online meeting in a 157-3 vote. In addition to the Sunday deadline to declare their candidacy, Harris and other potential Democra…