Perhaps because it has the largest concentration of Poles in the U.S? Would that be a good reason?
He doesn't visit Poznan, Gdansk, Wroclaw or Szczecin regularly, despite it having a large concentration of Poles. In fact, he doesn't even visit the UK or Holland regularly, despite all the Poles living there, too.
It's his choice as President to decide where to visit.
He refused to meet with Polonia but he went to the Holocaust Museum, I suppose to please his wife.
Perhaps because he realised that meeting with a bunch of idiotic, backwards people would be counter productive, particularly as many of them have outdated views concerning "what is Poland"?
Not a lot in the press about his usual gaffs, this time with Obama.
Doesn't bother me. He's doing a grand job as President - bringing up issues relevant to the people (visa waiver), not obstructing the Sejm and generally being quite peaceful and inclusive.
Don't you have any artifical gravestones to be praying at?