Far-right Rep. Marjorie Taylor Greene plunged a House Homeland Security Committee hearing into chaos Wednesday by accusing Rep. Eric Swalwell of having a “sexual relationship with a Chinese spy” — leading Democrats to unsuccessfully demand that the remark be purged from the record. Greene (R-Ga.) made the comment moments after Swalwell accused her of “anti-police rhetoric” and showed a print-out of a tweet she wrote promoting “Defund the FBI” merchandise in response to purported bureau bias. “That was quite entertaining from someone that had a sexual relationship with a Chinese spy — and everyone knows it,” Greene shot back, referring...