(February 13, 2020, 11:36 AM EST) -- CHICAGO — An insurer on Feb. 11 sued two subcontractor insurers in an Illinois federal court for equitable subrogation and equitable contribution regarding their duty to defend and indemnify a general contractor in a construction defect case involving a Michigan mall (Old Republic General Insurance Corp. v. Amerisure Insurance Co., et al., No. 20-992, N.D. Ill.)....