NEW DELHI : Mismanagement by the central government has led to a “full-blown crisis" on the India-China border, Congress president Sonia Gandhi said on Tuesday in a top-level party meeting that saw a section of leaders call for former Congress president Rahul Gandhi to return to the top post.The government has sought to respond in “denials, disinformation, and diversions" when questioned about defending India’s territorial integrity against Chinese intrusions, the main Opposition party said in a resolution passed during a meeting of the Congress Working Committee (CWC).The development is significant because the Congress, which has been among the most vocal on the issue, in its resolution on Tuesday assured support to the Union government.