Supporters of affirmative action at Harvard University have begun a public pressure campaign supporting the race-based admissions system in the wake of a recent Supreme Court announcement that it will hear a challenge to the practice. Harvard’s Black Men’s Forum has released a statement calling the case a “threat” to diversity at the Ivy League institution. “This lawsuit threatens to undermine efforts at Harvard and universities across the country to diversify their student populations and increase access to institutions of higher learning,” the group stated Jan. 25. The Harvard Gazette, which is mailed to alumni — including four current Supreme...