Indiana Republican Jackie Walorski wants another shot at Rep. Joe Donnelly's (D-Ind.) House seat.

After losing by a slim margin to the centrist Democrat in 2010, Walorski announced Tuesday that she's running again in 2012 amid speculation that Donnelly could jump ship for a Senate or gubernatorial bid next year.

The district could end up more Republican once the boundaries are redrawn ahead of 2012, potentially easing the path for Walorski and making Donnelly more likely to launch a bid for higher office. But Walorski insisted that redistricting didn't play into her decision to launch another campaign for the seat.

"I really want to be out before those [redistricting] numbers are out, because I'm really committed to fighting for this district," Walorski said in an interview with WNDU-TV Tuesday morning.

The Republican alluded to the possibility that Donnelly could decide against running for reelection next year, noting that she's already raising money and will begin campaigning in earnest as Donnelly "ponders his future."

At least some Indiana Democrats are working to convince Donnelly that a run for Senate might be the better play for him in 2012. With a contested GOP primary between Indiana State Treasurer Richard Mourdock and Sen. Dick Lugar, Democrats in the state see a chance to put the seat in play should Lugar lose the nomination.