Congress leader Sonia Gandhi should apologise for her party's Sandeep Dikshit likening the army chief to a "goon" and also disown him, union minister Nirmala Sitaraman said today. "We condemn it and demand that the Congress leadership, especially Sonia Gandhi, come forward and disown the leaders who are continuously insulting the army. They must apologise," Ms Sitaraman said, questioning whether it was a "Congress strategy to undermine the army's confidence".