Sen. Richard Lugar

(Indianapolis, Ind.) - U.S. Senator Richard Lugar says he won't actively campaign for senatorial nominee Richard Mourdock.

Mourdock, Indiana’s State Treasurer, defeated Lugar in the May 8 Republican primary, 61 to 39 percent.

Lugar appeared Sunday on CBS' "Face The Nation" with reaction to his defeat.

“I would say that I’ve offered advice to my former opponent and now candidate as to the kind of way he might be a constructive senator,” Lugar said, adding for the time being he does not plan an active campaign in support of Mourdock.

The 80-year-old said he thinks some voters thought he was too old. At 36-years, Lugar is the longest-serving Republican in the Senate. 

Lugar pointed to divisive politics as the main reason for his defeat.

“A large portion of the Republican Party of Indiana believed, apparently, in the idea of individualism as opposed to community, a sense of compromise, or a sense of talking across the aisle,” he said.

Mourdock faces Democrat Indiana Congressman Joe Donnelly in the November general election to succeed Lugar.

LINKS:

Mourdock Winner In Indiana Senate Primary