Twelve Democratic candidates are facing off in the fourth primary debate of the 2020 campaign on Tuesday in Westerville, Ohio.

Twelve Democratic candidates are facing off in the fourth primary debate of the 2020 campaign on Tuesday in Westerville, Ohio.

Twelve Democratic candidates are facing off in the fourth primary debate of the 2020 campaign on Tuesday in Westerville, Ohio.

Twelve Democratic candidates are facing off in the fourth primary debate of the 2020 campaign on Tuesday in Westerville, Ohio.