There’s no reason for Kamala Harris to participate any longer in the failing presidency of Joe Biden. If she chooses to assert her constitutional authority and seeks to build a majority political coalition, she can unify the country, ensure American prosperity and win election to the presidency in 2024. Starting today she can simply decide unilaterally to dominate policy-making in what’s left of the Biden era. This week brings more reports of her struggle to add value to Team Biden. But this team is losing and she can best help the country and herself by entering the political equivalent of...