The Marion County chief deputy of voter registration on the Democratic side, Scott Carr, confirmed that Santorum had not submitted 500 valid signatures. An Indiana Republican source said Santorum is “a couple dozen” signatures short, but that Newt Gingrich will be on the ballot.

The Indiana Primary won’t be held until May 8, and is unlikely to be decisive in any event, but Santorum’s shortfall cuts against some of his supporters hopes that he will rise as Newt Gingrich falls to provide a final challenger to Mitt Romney. This is the second ballot Santorum, who has been left off the Virginia ballot as well, has missed, and a failure to reach a minimum bar for a national candidate.