The American Postal Workers Union, on Wednesday, announced that they are endorsing Sen. Barack Obama for president.

“Sen. Obama’s message is one of hope and change,” APWU President William Burrus said in a statement. “His message is special, and the timing is right.”

“We are most impressed by Sen. Obama’s commitment to eradicating the undue influence of special interests in the political process,” he added. “Our current political system does not allow for the voices of average citizens to be heard over the demands of lobbyists and big-money campaign contributors.”

The American Postal Workers Union is an affiliate of the AFL-CIO, which reportedly represents some 300,000 postal workers nationwide.

Not sure that this will have a big effect on the outcome of the PA primary, but it is a good endorsement none the less.