I don't know about "close to zero". I say that as someone who believes it's less likely than a lot of people here think. There was literally a JetBlue pilot in uniform, standing behind Trump at his "one, big, beautiful bill" event last month, at the White House. After seeing Spirit go bankrupt and now ironically trying to reinvent itself to have options similar to a major carrier (the very outcome regulators were trying to avoid by denying the merger meant to preserve a true ULCC) combined with a shifting political climate, I wouldn't say the odds are "close to zero". Especially if your argument is the DOJ.