The Washington Post reports that Republican Sen. Chuck Grassley has turned his scrutiny of nonprofit organizations to the University of Chicago Medical Center, where Sen. Barack Obama’s wife, Michelle, has worked for about ten years:

The ranking minority member on the Senate Finance Committee is seeking information from the non-profit University of Chicago Medical Center about jobs held by Sen. Barack Obama’s wife and one of his best friends, The Post’s Joe Stephens reports.

Sen. Charles Grassley (R-Iowa) on Friday sent the center a letter saying he was “troubled” by recent news reports about the hospital’s efforts to steer patients with non-urgent complaints away from the center’ emergency room to local clinics. Michelle Obama was a key figure behind the initiative.

The letter, which Grassley released to the public today, does not directly mention the Democratic presidential nominee, his wife or his campaign. Grassley also asked for financial data, board minutes and other documents related to hiring, job promotion, business contracting and care for the poor.