The Texas Democratic Party said it has received concerns from both the Clinton and Obama campaigns about the other side improperly padding their caucus vote totals by getting primary voters to fill out sign-in sheets all day long rather than waiting until the primary polls close and the caucus process formally gets under way, but Texas Democratic Party officials tell ABC News they do not have any proof of wrongdoing.
Some polling stations in Ohio stayed open later than expected because they ran out of ballots. Election officials in Texas and Ohio said voter turnout was high, despite rain, sleet and flooding in some areas of Ohio.
The Democratic rivals battle next in Wyoming, Sunday, where 12 delegates are at stake, and in Mississippi, March 11, with 33 delegates.
The next big prize is Pennsylvania on April 22 with 158 delegates up for grabs. Many believe that if no clear winner can be determined before the final primary vote is cast in June, the two historic, formidable candidates could fight all the way to the party's Denver convention in August.
ABC News' Kate Snow, David Chalian, Rick Klein, Eileen Murphy, Andrew Fies, Kevin Chupka, Karen Travers, Gary Langer, Teddy Davis, Eloise Harper, Lauren Pearle, and Sunlen Miller contributed reporting.