Migrant families are loaded onto a bus that will take them to the ferry, on Martha’s Vineyard in Edgartown, Mass. on Sept. 16. Migrants shipped to Martha’s Vineyard by Florida’s Republican governor said on Friday that they had been misled about where they were being taken.MATT COSBY/The New York Times News Service Omar El Akkad is the Scotiabank Giller Prize-winning author of What Strange Paradise. One of the very few ideological ailments that seems to afflict both mainstream Democrats and Republicans is the delusion that politics and policy constitute a kind of sporting event: a game of rhetorical tennis in...