A three-judge panel Tuesday refused to toss out a lawsuit challenging the constitutionality of a 2022 Florida Senate redistricting plan, pointing to plaintiffs’ arguments that two districts in the Tampa Bay area were racially gerrymandered. The panel of federal judges issued a six-page order that denied a request by attorneys for Secretary of State Cord Byrd and Senate President Kathleen Passidomo, R-Naples, to dismiss the case, which was filed April 10 in Tampa. The lawsuit alleges that Senate District 16 and Senate District 18 are gerrymandered and violate constitutional equal-protection rig…