(CNN) - Despite a lengthy absence from Capitol Hill due to illness, Democratic Congressman Jesse Jackson Jr. will easily hold on to his Illinois seat, CNN projects.
Jackson handily defeated GOP contender Brian Woodworth, an attorney and university professor. Woodworth had criticized Jackson during the campaign for leaving the district unrepresented.
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The nine-term congressman has been away from Congress and largely out of the public eye since May. His office said in June he was taking a leave of absence, and the Mayo Clinic disclosed in August that he was suffering from depression.
Jackson is being investigated in separate cases for possible financial and ethical improprieties.
The FBI and federal prosecutors in Washington are investigating Jackson for possible financial improprieties, according to a law enforcement official.
The House Ethics Committee is looking into allegations that in 2008 Jackson or one of his associates offered to raise money for then-Illinois Gov. Rod Blagojevich in exchange for Jackson being appointed to the Senate seat vacated by Barack Obama.