Not to go too far off on a tangent, but I think, at least in part, there have been some recent changes that have reduced the amount of people playing the asylum card. I couldn't give you any sort of hard numbers, but I know there has been a significant decline since the whole "remain in mexico" policy went into effect. I would also say that the courts seem to have been as much of an obstacle as congress lately. Just about every major immigration change taken through executive order over the last few years has seen major legal opposition and quite a few policies have seen nationwide injunctions.