Chandigarh, May 30 -- The ballot battleground of Ludhiana West assembly constituency on Thursday witnessed major political action as the Congress candidate for June 19 bypoll, Bharat Bhushan Ashu and Shiromani Akali Dal (SAD) nominee Parupkar Singh Ghuman filed their nomination papers, formally entering the fray for the high-stakes contest. The Bharatiya Janata Party (BJP) is expected to announce its candidate anytime now, while the ruling Aam Aadmi Party (AAP) has fielded its Rajya Sabha MP Sanjeev Arora-in an attempt to retain the seat - setting the stage for a multi-cornered and fiercely competitive electoral battle in one of Punjab's most politically-significant constituencies. The last date to file nominations is June 2, while the resu...