Changes in top ministries of home and finance may be part of a larger reshuffle that Prime Minister Manmohan Singh is likely to effect after the President's election to rev up governance. P Chidambaram's likely shift to the finance ministry is expected to have a ripple effect , forcing a larger exercise to fill key ministries like home. Sources said the rejig, likely before the beginning of the monsoon session on August 7, may mean an opportunity for the DMK to reclaim the two berths from its quota that have been lying vacant since the ouster of A Raja and Dayanidhi Maran from the ministries of telecom and textiles . The southern ally seems to be keen to avail of the entitlement.