Transportation Secretary Sean Duffy, a former Fox News host who spent the weekend blaming Democrats for airport-security lines, is not in fact in charge of airport security. He is in charge of the Federal Aviation Administration, which handles air traffic and mishandled the Air Canada landing at LaGuardia. If he didn’t know before, he hopefully knows now that what happened yesterday was not simply an outlying tragedy, but the inevitable culmination of long-standing safety concerns and shortsighted funding cuts.