But at this point in the race, if the Club wants to defeat Lugar, it really has no choice but to get behind Mourdock. The filing deadline was last Friday, and aside from Mourdock and Lugar, nobody else filed. There had been buzz that was squashed before the filing period opened that another candidate might jump in the mix. That would have been great news for Lugar, and would have meant less incentive for the Club to enter the fray.
With other House and Senate races on its radar, it remains to be seen much the Club is willing to play in Indiana, especially if Lugar's chances of victory appear likelier as May 8 approaches. The endorsement is unquestionably good news for Mourdock, but he could have used the help earlier.
"I never worry about things I can't control," Mourdock said in an interview with Hotline On Call on Saturday at the Conservative Political Action Conference in Washington, when asked about outside groups and figures, like the Club, who hadn't yet gotten behind him. "I hope they get on board with us, but if they don't we're going to win anyway."
He's got some more momentum today, but how precisely how much cannot be quantified just yet.