Days after facing humiliating defeat in Punjab from the Aam Aadmi Party (AAP), state Congress chief Navjot Singh Sidhu on Wednesday resigned from the post. The AAP came to power by sweeping the Assembly polls with a three-fourths majority as heavyweights fall by wayside. In a one-line resignation to party President Sonia Gandhi, Sidhu wrote, "I hereby resign as President (PPCC)."