* Former Vice President Joseph R. Biden,
* Former New York City Mayor Michael Bloomberg,
* New Jeresey Sen. Cory Booker,
* South Bend, Ind. Mayor Pete Buttigieg,
* Hawaii Rep. Tulsi Gabbard,
* Minnesota Sen. Amy Klobuchar,
* Former Massachusetts Gov. Deval Patrick,
* Vermont Sen. Bernie Sanders,
* Billionaire businessman Tom Steyer,
* Massachusetts Sen. Elizabeth Warren.
Democrat Andrew Yang will mount a write-in campaign. Yang said in a statement that an awkwardly worded Ohio law led to him not making the primary ballot.
His omitted a section of the petition that signifies which candidate voters are signing the petition for.
“I’m duty-bound to follow the law, and the law is clear - when Ohioans sign a petition, they deserve to know what they’re signing,” Ohio Secretary of State Frank LaRose said.
RELATED: Presidential and state races to see primary challenges
Military and overseas voting starts Jan. 31. The deadline for Ohioans to register to vote is Feb. 18 for the March 17 primary. Early voting in Ohio starts Feb. 19.
Ohio’s primary comes after more than two dozen other states will have held primaries and caucuses.
Then-governor John Kasich won the Ohio GOP primary in March 2016 with 44.46 percent of the vote to Trump’s 37.18 percent.
In the 2016 general election, Trump got 51.7 percent of the vote while Democrat Hillary Clinton received 43.56 percent in Ohio.
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Presidential election calendar
Some key upcoming dates in the presidential election
Jan. 14: Democratic presidential debate, Iowa
Feb. 3: Iowa Caucuses
Feb. 7: Democratic presidential debate, New Hampshire
Feb. 11: New Hampshire primary
Feb. 19: Democratic primary debate, Nevada
Feb. 22: Nevada Caucuses
Feb. 25: Democratic primary debate, South Carolina
Feb. 29: South Carolina primary
March 3: Super Tuesday
March 17: Ohio primary