SARVER, Pa. — The heartbroken widow of Corey Comperatore, the hero firefighter shot dead by a sniper at a Donald Trump rally, wanted nothing to do with President Biden when he called after the tragedy, she told The Post. “I didn’t talk to Biden,” Helen Comperatore said from her Pennsylvania home Monday. “I didn’t want to talk to him. My husband was a devout Republican and he would not have wanted me to talk to him.”