ST. PETERSBURG, Fla. — As Florida became a global epicenter of the coronavirus, Gov. Ron DeSantis held one meeting this month with his top public health official, Scott Rivkees, according to the governor's schedule. His health department has sidelined scientists, halting briefings last month with disease specialists and telling the experts there was not sufficient personnel from the state to continue participating....

DeSantis (R) this month traveled to Miami to hold a roundtable with South Florida mayors, whose region was struggling as a novel coronavirus hot spot. But the Republican mayor of Hialeah was shut out, weeks after saying the governor "hasn't done much" for a city disproportionately affected by the virus.

As the virus spread out of control in Florida, decision-making became increasingly shaped by politics and divorced from scientific evidence, according to interviews with 64 current and former state and administration officials, health administrators, epidemiologists, political operatives and hospital executives.

The crisis in Florida, these observers say, has revealed the shortcomings of a response built on shifting metrics, influenced by a small group of advisers and tethered at every stage to the Trump administration, which has no unified plan for addressing the national health emergency but has pushed for states to reopen.

DeSantis relies primarily on the advice of his wife, Casey, a former television reporter and host, and his chief of staff, Shane Strum, a former hospital executive, according to Republican political operatives, including a former member of his administration....