Former Rep. Gabby Giffords (D-AZ) issued an urgent message in The New York Times Tuesday following the second armed assassination attempt on former President Donald Trump — get gun violence under control, now. Her column was published a day after the suspect in the latest assassination attempt was charged with illegally possessing a gun with a felony conviction and possessing a gun with an obliterated serial number. “There have now been two assassination attempts on former President Donald Trump in just over two months,” said Giffords, who was critically injured in a shooting in 2011. Want mor…