HOUSTON (AP) — Kamala Harris and Beyoncé ignited a Houston rally with a double-barreled argument against Donald Trump on Friday, with the superstar telling the Democratic nominee’s biggest crowd ever that it was “time to sing a new song” as Harris warned that her GOP opponent was dead set on further eroding women’s rights. The rally was set in reliably Republican Texas, to highlight the growing medical fallout from the state’s strict abortion ban, but the message was intended to register in the political battleground states, where Harris is hoping that the aftereffects from the fall of Roe v. …