Rick Santorum, following the news that he fell 24 signatures short of qualifying for the Indiana ballot, told a crowd in Fulton, Mo., that he plans to challenge the decision. POLITICO's Juana Summers:

“I think we're 24 signatures short because, as you may know, they changed, they put the petitions out before redistricting. While the petitions were out, they changed the district lines. And some of the signatures we had were in that district, but the old district, not the new one. From our perspective -- and they invalidated a whole bunch of signatures. We're gonna review. We're only 24 short. They invalidated 200 that they said were not good because of ditto marks, things like that. So we're going to go back and look. We have to make up 24 signatures. And I think the fundamental issue is you can't have petitions circulated and have one district be one thing, and then halfway through have the district change and not count the districts, the signatures that were given at the time that they were in fact in that district.”

“We've got some very credible, I'm sure, solid legal challenges, and I have no doubt that we'll be on the ballot.”

Asked if he will definitely challenge the decision in court he added: “Oh absolutely. We are challenging it right now.”