Eyewitness News was at Mourdock's camp when the announcement was made.
The Democrat Party released the following:
Indiana Democrats thanked Senator Richard Lugar for his service and previewed their fall campaign against TEA Party Treasurer Richard Mourdock Tuesday night in a statement released shortly after media outlets declared Mourdock the winner of the Indiana GOP Senate Primary.
"Like all Hoosiers, we owe Senator Lugar a debt of gratitude for his long and storied career. From his service as a Naval Officer to the United States Senate, Senator Lugar has spent over half a century doing difficult work on behalf of Hoosiers," said Democratic Party Chairman Dan Parker.
"His successor will come into office facing a still-recovering economy and thousands of Hoosier families struggling to pay the bills. The man that won tonight's Republican primary, Richard Mourdock, is a TEA Party extremist who is out of touch with Hoosiers. After telling the Indianapolis Star that he 'didn't take a pledge to support every Hoosier job' while challenging the rescue of Chrysler, Mourdock called his attempt to kill more than 1.1 million jobs his 'Rosa Parks moment.'"
"Richard Mourdock thinks Social Security and Medicare are unconstitutional, wants to cut $11 billion from funding for veterans' care and $5 billion from Indiana students and classrooms. Hoosiers deserve real leadership that will reach across the aisle in Richard Lugar's successor, not Richard Mourdock's TEA Party extremism."