Just a day before Super Tuesday, Vermont Sen. Bernie Sanders and former Secretary of State Hillary Clinton are about even in Oklahoma.

A poll released Monday shows Sanders in the lead in Oklahoma's Democratic primary, with a five-point lead over Clinton. That lead is within the poll's 5.7 percent margin of error.

Sanders polled at 48 percent to Clinton's 43 percent. Another 8 percent said they were undecided, and 1 percent said they planned to vote for another candidate.

Meanwhile, real estate mogul Donald Trump continued to lead the Republican field, with 35 percent. Texas Sen. Ted Cruz came in second, with 23 percent, and Florida Sen. Marco Rubio came in third, with 22 percent. The Republican poll has a 4.9 percent margin of error.