FILE - AFL-CIO Secretary-Treasurer Richard Trumka, is seen during an orientation meeting with summer interns, in this June 1, 2009 file photo taken in Washington. Trumka is expected to issue the ... more 
FILE - AFL-CIO Secretary-Treasurer Richard Trumka, is seen during an orientation meeting with summer interns, in this June 1, 2009 file photo taken in Washington. Trumka is expected to issue the warning in a speech Friday May 20, 2011 at the National Press Club. Trumka is expected to issue the warning in a speech Friday at the National Press Club. less 
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Associated Press | Photo By Manuel Balce Ceneta, File
Fri, May 20, 2011 7:33 AM EDT