There was no air support, and the whole works had been leaked in the press. Amateur hour at the White House is nothing new.
A twist to the story is, JFK got word in 1960 that the US was secretly planning a Cuban landing. Nixon, being a member of the administration, couldn't talk about it.
So in the presidential debates, Kennedy kept hammering at the Eisenhower administration's "weak" Cuban policy, knowing that Nixon could not answer back, for fear of getting the wind up in Cuba.