Why in American politic they failed to do some impact, and I'm not talking about one or two Congressmen or Senators.
here is your answer, cut out from a similair tthread:
In early 20th century, some ethnic slurs were popularized to describe Polish people in the U.S., such as "Polacks" or the term "white *******" - used by the White Anglo-Saxon Protestants (WASPs) due to the fact that Polish-American men were marrying African-American women regardless of their race,[54] but most notably, it was the spread of Polack (or Polish) jokes.
The WASPS are still in charge. Don't let the election of Obama fool you.