Congress president Sonia Gandhi Saturday appointed Amarinder Singh Brar (Raja Warring) as the party's new Punjab chief in place of Navjot Singh Sidhu, and former Rajya Sabha member Pratap Singh Bajwa as the new legislature party leader.Congress president Sonia Gandhi Saturday appointed Amarinder Singh Brar (Raja Warring) as the party's new Punjab chief in place of Navjot Singh Sidhu, and former Rajya Sabha member Pratap Singh Bajwa as the new legislature party leader.