Democrats are dangerously divided between the party mandarins who enabled Joe Biden to run again against Donald Trump and younger voters who are so disaffected by their party’s death grip on the status quo that they are threatening not to vote in November. This generational clash happens also to be playing out on the stage of Lincoln Center. N/A is a clever two-woman show about House Speaker Nancy Pelosi and congressional Squad leader Alexandria Ocasio-Cortez. Written by Mario Correa, who once worked as a congressional aide, it pits Holland Taylor as a cunning but self-aware Pelosi against the rebellious, passionate, and whip-smart A.O.C., played by Ana Villafañe. Both politicians make persuasive arguments: one against rocking the boat; the other, for blowing it up. N/A runs through the end of July, and it’s well worth the watch, if only as a viewing guide to the Democratic convention in Chicago in August. —Alessandra Stanley