Down etc., it may interest you to know that our retention rate of US nationals is extraordinarily low. Almost all have left, will leave and talk about leaving.
All the hothead talk aside, ask yourself why.
I don't give a toss if you apply, interview, get offered a job or the door. What I do care about is the very high cost of training someone for another carrier and the effect on the bottom line of CX.
I have found most Americans to be pleasant folks and good operators, and it's a shame to see them leave...all the good ones do.
Just make an informed intelligent decision based on facts, as I am sure you will, and you're 95% of the way.