INDIANAPOLIS - Three high-profile Republicans will visit Indianapolis to stump for Senate hopeful Richard Mourdock this month, his campaign announced Monday.

Sen. John McCain will headline a breakfast for supporters at Mo's Steakhouse downtown Wednesday. The event begins at 8 a.m.

Next week, Senate minority leader Mitch McConnell, of Kentucky, will host a fundraiser at the home of an Indianapolis supporter Oct. 22, and New Hampshire Sen. Kelly Ayotte will speak at a lunch at the Columbia Club downtown Oct. 24.

Mourdock, Democrat Joe Donnelly and Libertarian Andrew Horning will face off in their first debate Monday night.

Indiana's Senate battle is one of about a half-dozen tight races across the county that will decide whether Democrats or Republicans control the Senate.

Donnelly has put the seat in play for Democrats since Mourdock upended veteran Sen. Richard Lugar in May's GOP primary. Mourdock has had trouble locking in support from moderate Republicans.

The second and final Senate debate will be Oct. 23 in New Albany.