Sen. Cory Booker is a potential Democratic presidential candidate in 2020. | Cheryl Senter/AP photo elections Booker to campaign for Espy in Mississippi Senate race

Sen. Cory Booker will campaign for Mississippi Democratic Senate candidate Mike Espy on Monday, according to two Democratic officials with knowledge of his plans.

It's Booker's second trip to Mississippi for Espy, who's vying to unseat Republican Sen. Cindy Hyde-Smith. The potential 2020 candidate previously campaigned for Espy in Jackson, Miss., in July.


Sen. Kamala Harris (D-Calif.), another prospective 2020 contender, is scheduled to campaign for Espy on Saturday.

The visits by the two African-American senators come as national Republicans have begun mobilizing to ensure the race doesn't spin out of the party's control. A video recently surfaced of Hyde-Smith joking that she would be in "the front row" of a public hanging if she were invited by a supporter.

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Hyde-Smith also recently suggested to a group in Starkville that Mississippi might want to make it more difficult for "liberal folks" to vote.

Hyde Smith's campaign on Friday said that that comment was "all a joke."