Amazingly, I have never heard KXEL here in south Florida. Much if that is due to ZNS in Nassau dominating....but even in the month or two that they were off the air (copper thieves), no KXEL for me.
However, I believe that KXEL dominates much of mid-America & parts of the Northeast.
There might be a small issue with CHIN, the multilingual Toronto station. (BTW didn't the 1540 in Albany NY go bye bye?)
KXEL throws a null right at you. I don't recall ever hearing it anywhere in Florida.
CHIN can become a bit of a pest once you get into the eastern Great Lakes on the U.S. side of the border. But most of the juice is aimed into Canada. I'm pretty sure they're also planning to go "bye bye" and migrate to FM. (Perhaps Tincap, Yeziknoradio, Mimo, or one of the other Canadians can shed some light on this).
I'm unclear to what extent...if any...this would help KXEL's effective nighttime coverage.