(CNN) - Four presidential candidates have filed their paperwork to get on Ohio's primary ballot - including Newt Gingrich, after speculation the former House speaker might miss Wednesday's 4 p.m. deadline.
The campaigns of Gingrich, President Barack Obama, Texas Gov. Rick Perry and former Massachusetts Gov. Mitt Romney filed with Ohio's secretary of state's office.
Gingrich could have waited to file next year, once the new June 12 primary date goes into effect and the filing deadline is extended to March, but it likely would have raised more questions about the GOP frontrunner's lean campaign operation and reach in non-early primary states.
Minnesota Rep. Michele Bachmann, former Utah governor and ambassador Jon Huntsman, Texas Rep. Ron Paul, and former Pennsylvania Sen. Rick Santorum did not make Wednesday's deadline, according to Ohio Republican Party Communications Director Chris Maloney.
Maloney said that Ohio's secretary of state, John Husted, encouraged all of the presidential candidates to make the deadline out of precaution, since the March filing deadline doesn't apply until the new bill takes effect in January 2011.
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