via Fox 6 now by THEO KEITH

MARSHFIELD -- The Wisconsin man who blew the whistle on political campaigning by postal workers says U.S. Senator Tammy Baldwin's office never responded to his concerns, an accusation Baldwin's office denies.

Timm Kopp, a letter carrier from Marshfield, grew concerned that postal workers were allowed to take time off work to campaign for their unions' preferred Democratic Party candidates, causing staff shortages.

A federal investigation found the U.S. Postal Service had violated a federal law, and the agency has promised changes.

"I never expected it to get to this point. Basically all I did is, I wanted to raise concerns about things that were not being done correctly," Kopp said during July 19 testimony before the U.S. Senate Homeland Security Committee.

Investigators found that the Postal Service allowed nearly 100 workers in several states, including Wisconsin, to take unpaid time off to do political activity for their union. The practice cost the Postal Service $90,000 in overtime to fill staff shortages, the U.S. Office of Inspector General found.

The complete story here > Wisconsin whistleblower on political campaigning by postal workers says Sen. Baldwin never responded



WASHINGTON, DC - MARCH 21:  Sen. Tammy Baldwin (D-WI) speaks during a news conferene at the U.S. Capitol March 21, 2013 in Washington, DC. Baldwin and fellow senators held the news conference to criticize the House of Representatives for passing House Bud