Biden’s Pick for Top Labor Board Attorney Faces Crucial Test

President Joe Biden’s nominee for National Labor Relations Board general counsel could be one of the most consequential to ever hold the job—a prospect that will weigh on lawmakers when she appears for her Senate confirmation hearing Thursday.

Republicans will likely ask Jennifer Abruzzo about Biden’s firing of her Trump-appointed predecessor, which cleared the way for her nomination; her role on the president’s transition team; and her previous work as an attorney for the Communications Workers of America.

The questions surrounding Abruzzo’s nomination demonstrate how her decades of experience at the NLRB—paired with the Biden administration’s vocal support for organized ...