Election 2012

Senate GOP Invests Money in Tight Indiana Race

Democratic candidate Joe Donnelly has stayed neck and neck with Republican Richard Mourdock since May.

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Senate Republicans will jump into Indiana's pitched Senate battle this week, responding to a Democratic ad-buy with one of their own as they seek control of the Senate in November.

The National Republican Senate Committee will spend $650,000 on an ad that will run statewide on broadcast and cable for one week starting Tuesday. A Republican Party source tracking ad buys confirmed the new spot Sunday on condition of anonymity because it has not aired yet.

The NRSC buy tops Senate Democrats', who have spent $516,000 on a spot airing at the same time, and marks the committee's first foray on air in Indiana this cycle.