Like a lot of Mississippi Republicans, Smith seems willing to forgive the senator for some of the eyebrow-raising remarks she's made in recent weeks.
The Mississippi runoff gives Trump another chance to get back on the campaign trail after his frustrations with the media's coverage of the midterms, which saw Republicans lose control of the House while likely picking up two seats to expand their narrow Senate majority.
"She stood up to the Democrat smear machine", Trump said.
Her supporters said the furor over her comments was overblown.
One hundred percent of the poll respondents who voted for McDaniel on November 6 said they will vote for Hyde-Smith on Tuesday.
Donald Trump praised Ms Hyde-Smith as he headed to Mississippi to lead two rallies for the senator. The special election victor gets to serve out the final two years of Cochran's term. Thad Cochran, who resigned in April amid health concerns. Cindy Hyde-Smith, 59, would be the first woman elected to Congress from MS, and Democrat Mike Espy, 64, would be the state's first African-American U.S. senator since Reconstruction.More news: Ohio Governor John Kasich burns MI with hilarious resolution
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Hyde-Smith was seen in another video talking about making voting hard for "liberal folks", and a photo circulated of her wearing a replica Confederate military hat during a 2014 visit to Beauvoir, a beach-side museum in Biloxi, Mississippi, that was the last home of Confederate president Jefferson Davis.
The Mississippi Department of Public Safety is looking for several suspects believed responsible for placing a pair of nooses and signs on the Mississippi state Capitol grounds Monday morning.
President Donald Trump fired up a MS rally crowd Monday by referring to barbed-wire fences erected by military troops along the U.S. -Mexico border as "pretty nasty".
MS voters will decide on Tuesday between Republican Sen. "We need someone who respects the live of lynch victims", one sign reads. Then she issued an apology to "anyone who was offended", without indicating that there was actually anything to cause offense. As the white and Republican blocs in MS are larger than the black and Democratic blocs, it seems likely that her larger base will carry Hyde-Smith to a moderately strong victory. In his closing statement at the debate, Espy called Cochran a "thoughtful" and "efficient" senator, adding, "I would hope to be the kind of senator that Senator Cochran is".
MS - which still has the Confederate battle emblem on its state flag - has a history of racially motivated lynchings.
At the debate with Hyde-Smith, Espy embraced the slogan "Mississippi first", a transparent tribute to Trump, declaring, "Mississippi first means I value MS over everything else - over party, over persons, over everybody". Earlier this year, two Trump aides implored Gov. Phil Bryant to appoint someone else to the seat following the retirement of longtime Republican Sen.
Espy said he refused to accept plea deals because, "I was so not guilty, I was innocent". "I was going to vote for Mike Espy anyway". "While we support candidates who promote pro-growth policies for business and technology, we do not condone these remarks and would not have made such a contribution had we known about them".