As a Black student who was raised by a single mother, Makia Green believes she benefited from a program that gave preference to students of color from economically disadvantaged backgrounds when she was admitted over a decade ago to the University of Rochester. As a borrower who still owes just over $20,000 on her undergraduate student loans, she has been counting on President Joe Biden’s promised debt relief to wipe nearly all of that away. Now, both affirmative action and the student loan cancellation plan — policies that disproportionately help Black students — could soon be dismantled by the U.S....