(CNN) - Rep. Jesse Jackson, Jr. of Illinois is on a medical leave-of-absence while being treated for exhaustion, his office said in a statement.
The Democratic congressman has been on leave since June 10.
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While spokesman Frank Watkins gave no further details in a statement, he said Jackson's office remains open for constituent services.
Jackson, first elected in 1995, represents the state's 2nd Congressional District, which includes parts of Chicago's South Side and Cook County suburbs.
"He asks that you respect his family's privacy," Watkins said.