The Obama administration is engaged in a “final coordinated push” to enroll blacks in ObamaCare, White House senior adviser Valerie Jarrett said Friday. Jarrett said blacks have a “disproportionately low rate of coverage,” and called enrolling them the administration’s “top priority.” “We still have a long way to go and we want to make sure we take advantage of every opportunity for outreach,” she said in a Friday conference call with reporters and three mayors that preside over large black communities: Kevin Johnson of Sacramento, Calif., Michael Nutter of Philadelphia and A.C. Wharton of Memphis, Tenn. An estimated 6.8 million...