If Navjot Singh Sidhu is still unsure which way he should head politically after quitting the BJP, the Congress' Punjab chief Amarinder Singh has a helpful hint. "Sidhu has the Congress in his DNA. His father was a general secretary of the party and remains a member. I know him since he was a boy," said Mr Singh today, reiterating that the "doors of the Congress are open for Sidhu," who declared his disenchantment with the BJP last month and has since been in talks to join the Aam Aadmi Party or AAP ahead of assembly elections in Punjab.