The recent Assembly election results have not only weakened regional parties and smaller anti-BJP players, but also recalibrated the power balance in the Lok Sabha, where the ruling party lacks a majority on its own. While the BJP continues to rely on its NDA allies to cross the halfway mark in the Lower House, the electoral setback suffered by regional heavyweights has handed the party a significant strategic cushion. With the DMK distancing itself from former ally Congress, it is keeping open the option of extending issue-based support to the BJP, sources said. In the Lok Sabha, where the BJP has 240 MPs and depends on allies to pass Bills, potential support from the 22-member DMK — the two parties were allies from 1999 to 2003 — on issues they can find common ground on could prove crucial for its legislative and reform agenda.…