Mark down Monday, Oct. 12, 2020, as the date when Ron DeSantis officially stopped pretending that public health was more important than politics.That’s when Florida’s governor walked into a packed Donald Trump rally in Sanford, high-fiving fans on his way to the stage. No mask. No social distancing. Just acting like everything was perfectly normal on a day when the state reported nearly 2,600 new coronavirus infections and 48 COVID-19 deaths (the next day it was 119 dead).What an evolution for the governor since April 1, when Florida reported 1,027 new infections and just 15 deaths and DeSanti…