In Ohio, Clinton earned 63 percent while Sanders earned 33 percent. According to the TPM PollTracker Average, Clinton has a 16.3-point lead over Sanders.
In Florida, the former secretary of state earned 61 percent while Sanders earned 34 percent. According to the TPM PollTracker Average, Clinton has a 30.7-point lead over Sanders.
In a general election match-up, the poll found Clinton led Donald Trump by 7 points in both Ohio and Florida. She would also lead Cruz by 9 points in Ohio and lead Rubio by 3 points.
In Florida general election match-ups, Cruz beats Clinton in this poll by 1 point and Rubio leads by 4 points.
The Ohio and Florida primaries are Tuesday.
The polls were conducted from March 2-6 among 264 likely Democratic voters in Florida and 294 likely Democratic voters in Ohio. The margin of error in Florida was plus or minus 6 points among Democrats and plus or minus 5.5 points in Ohio.