Yes, tell someone to go to another carrier because you have a hunch PSA might someday have a base where they want to be, based solely on the fact it seems like, to you, Republic has less planes in DCA. Yes, regionals open and close bases (Republic in particular) but you gotta go with the sure thing at that given point in time. The only bet I'd gamble on is that Republic is never going to leave the East Coast. So at least if DCA does close, the OP should have an easy commute.