Senate Republicans believe president signaled shift from earlier refusal to negotiate, according to media reportsTell us: are you travelling in the US during the TSA staff shortage?Sign up for the Breaking News US emailGregory Bovino, the customs and border protection (CBP) commander who led the agency’s aggressive anti-immigration push in Minneapolis before being sidelined by the White House, has decided to go out with a bang it would seem.Having announced his forthcoming retirement from the CBP, the publicity-hungry Bovino – known for his florid statements – has given an interview to the New York Times that stresses defiance over contrition.