There was news of growing distance between the party and Sidhu since then and BJP tried to take him into confidence again before the Punjab Assembly elections in 2017 by giving him a Rajya Sabha berth. Sidhu, however, shocked many by resigning on the first day of the ongoing Monsoon session. Immediately after his decision came out, there were speculations that he would be joining the Aam Aadmi Party.
AAP Punjab chief had also taken to Twitter only hours after his resignation and said that Sidhu was welcome to join the party. His wife, Navjot Kaur Sidhu, is also a BJP leader and an MLA from Punjab. It is expected that she too will join AAP along with her husband. On the other hand, former Punjab Chief Minister and Congress leader Capt Amarinder Singh had also said that Sidhu would be welcome to join the party if he wished so.