State Elections Commissioner Elaine Manlove says her office is hard at work.
They came in this morning, I don't know exactly how many, but it was well over the 500, so we will go through the process. Once we get to 500, we will put it on our web site," says Manlove.
Santorum joins Newt Gingrich Mitt Romney, and Ron Paul, who just handed in his signatures Thursday.
Delawareans head to the polls for the presidential primary on April 24, 2012.
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