Gov. Mike Pence has spent the day in New York City, touting Indiana's economic record.
Pols hope presidential debate parties being held in Indiana will encourage more people to volunteer.
Indiana's voter turnout was much lower than the previous presidential primary four years ago.
Democrats are criticizing the former Massachusetts governor for opposing the auto-bailout.
Since Romney has all but won the Republican presidential nomination, Indiana is no longer a factor in the presidential primary.
The Indiana GOP says it does not think the outcomes of Super Tuesday will affect its own presidential primary on May 8.
Rick Santorum will appear on the Indiana primary ballot after Marion County originally said he had not received enough signatures.
Indiana voters are challenging Rick Santorum's appearance on the Indiana presidential primary ballot.
A Lafayette resident filed a petition but had only gathered one signature.
Rick Santorum did not have enough signatures to qualify for Indiana's primary ballot.