Tamilaga Vettri Kazhagam (TVK) chief and candidate from the Perambur constituency, Vijay, celebrates after winning in the Tamil Nadu Assembly elections results, in Chennai, Monday, May 4, 2026. (PTI Photo) Tamil Nadu is preparing for something it has not seen in decades — a coalition government, assembled as much through arithmetic as through adaptation, with early signs of an unconventional power structure, including plans to bring in former IAS officer U Sagayam through a by-election. With Vijay’s Tamilaga Vettri Kazhagam (TVK) falling short of the majority mark of 118 in the 234-member Assembly, attention has shifted swiftly from celebration to construction. By Tuesday morning, as Vijay visited his party office and convened meetings with newly elected MLAs, the outlines of a coalition were already visible. The numbers are not complicated. The Congress (which has five seats), the VCK (2), CPI (2) and CPI(M) (2) together offer a bloc of about 11 MLAs — enough to push Vijay comfortably past the halfway mark.…