[Lakeshark]

I have no link, but a clear memory that he not would not endorse Mourdock (sp?), campaign for him, and eventually said he was going to vote for the democrat.

I'm fairly certain that's correct.

[ansel12]

There is some confusion about a formal endorsement, but there was no support from Lugar.

Wed, Oct 17, 2012
“”INDIANAPOLIS (AP) — Retiring Republican Sen. Richard Lugar is disputing a conservative mailer in Indiana that claims he supports Republican Richard Mourdock and reiterating he will not campaign for the tea-party backed opponent who unseated him in May.
Lugar spokesman Andy Fisher said Wednesday the piece was “clearly unauthorized” and comes from a group that spent $100,000 against Lugar in the primary. Conservative lawyer Jim Bopp’s super PAC sent the mailer to Hoosier voters this week.
Mourdock has continued to try and win Lugar’s mantle in the general election — claiming in Monday’s debate that he had been endorsed by the senator — but Lugar has kept him at arms-length throughout the campaign. Mourdock said Wednesday he’s not responsible for messages sent by outside group’s like Bopp’s.””

[martiangohome]

Lugar “supported” Mourdock, but did not campaign for him...

http://www.humanevents.com/2012/09/23/indianas-lugar-backs-tea-party-mourdock-in-senate-run/