Senate candidates Cindy Hyde-Smith and Mark Epsy will likely need the young vote to secure the election on Tuesday.
President Donald Trump has tweeted support for U.S. Sen.
Hyde-Smith campaign spokeswoman Melissa Scallan responded to the report by saying: "In their latest attempt to help Mike Espy, the gotcha liberal media has taken leave of their senses". Trump won 58 percent of the state's vote in 2016, and Hyde-Smith has tied herself closely to his presidency.
Espy, if elected, would be the first black man or woman elected by the state to Congress since Reconstruction and the first Democrat since 1982.
Trump returned Sunday evening from Florida, where he spent the Thanksgiving holiday at his Mar-a-Lago club.
It's the last Senate race of the 2018 election season, in which Republicans held onto their slim majority in the Senate, but lost control of the House.
About a third of MS voters were African-American in the four-way race on Election Day, and Espy won support from about 80 percent of them, compared to about 20 percent of white voters, according to VoteCast, a wide-ranging survey of the electorate conducted by The Associated Press.
Hyde-Smith spoke to Republican stalwarts at a Meridian museum Sunday afternoon supported by U.S. Sen.
A Democrat running for U.S. Senate in MS says he would bring experience of "diversity" and "inclusion" to the job, and he thinks the Republican he's trying to unseat has a background lacking in those qualities. Thad Cochran, who resigned in April for health reasons.
"If we win tomorrow, we'll be at 53-47 which is substantially more than we had", Trump said. She's been seen in a photo wearing a replica hat of a Confederate soldier and in a video praising a supporter by saying, "If he invited me to a public hanging, I'd be on the front row". Her campaign said the remark about voting was a joke. In recent weeks, her campaign has been under increased scrutiny, including from donors, over controversial comments she has made in a race against an African American candidate and in a state with a sordid racial past and a history of lynchings.
Trump said repeatedly Monday that Hyde-Smith had apologized for her comments and that he believed she was honest.
"My approach is MS first", Espy said at last week's debate.
Walmart asked Hyde-Smith to return a $2,000 campaign contribution because of the hanging remark.
Hyde-Smith's campaign called the school issue a personal attack on her family meant to draw attention away from real issues.
Hyde-Smith believes the Affordable Care Act, also known as Obamacare, should be repealed.
Hyde-Smith and Espy debated Tuesday night.
"I also recognize that this comment was twisted and it was turned into a weapon to be used against me", she said.
The president also touted Monday's rallies, adding Hyde-Smith "is an outstanding person who is strong on the Border, Crime, Military, our great Vets, Healthcare & the 2nd A. Needed in D.C".