Trump also cautioned that a Democratic win by Espy could "revoke" gains Republicans make in the Senate earlier this month.
Since the comments, the runoff election between Hyde-Smith and Democrat Mike Espy in the ruby red state has become increasingly close, with some Republicans fearing the party may see a repeat of what happened in the Alabama special election a year ago that saw Democrat Doug Jones defeat Roy Moore.
President Donald Trump brought back the playbook he used during the leadup to the midterm elections, warning of the dangers of illegal immigration and painting Democrats as radical "socialists", as he returned to the campaign trail Monday to try to keep a Mississippi Senate seat in GOP hands.
Trump said Monday at a campaign rally in MS that he is sending the caravan members a clear message: "Turn around and go back home".
I don't know what's in your heart - but we all know what came out of your mouth...
"If he invited me to a public hanging, I'd be on the front row", Hyde-Smith said, referring to a supporter, during a campaign stop in Tupelo on November 2. She said it was "an exaggerated expression of regard".
President Donald Trump rallied voters Monday for Republican Senate appointee Cindy Hyde-Smith who has found herself in a closer-than-expected runoff contest after comments she made about attending a public hanging drew condemnation.
Trump said repeatedly Monday that Hyde-Smith had apologized for her comments and that he believed she was honest. Tuesday's election will determine whether Hyde-Smith or Espy will serve the remainder of Cochran's term, which ends in 2020.
Trump, asked about Hyde-Smith as she sat nearby at a question-and-answer session with reporters, said her comments struck him initially as "something that was sad" and a little flippant but that she had apologized for them when they spoke about it on the phone.
State and federal investigators are trying to find out who hung seven nooses in trees outside the Mississippi Capitol early Monday, a day before a U.S. Senate runoff that has focused attention on the state's history of racist violence.
Students at the college had seen some of the attack ads against Hyde-Smith - but they couldn't say much about what Espy, a Secretary of Agriculture under President Clinton, stands for.
MS voters will decide on Tuesday between Republican Sen. "We need someone who respects lives of lynching victims", one sign read.
While most candidates being outed like this would be the kiss of political death, political pundits have speculated that MS is likely to consider Smith's racism a perk.
Addressing his supporters Tuesday night, Espy said: "While this is not the result we were hoping for, I am proud of the historic campaign we ran and grateful for the support we received across Mississippi".
Hyde-Smith was in her second term as Mississippi's elected agriculture commissioner when Republican Governor Phil Bryant chose her to temporarily succeed longtime Republican Senator Thad Cochran, who retired in April amid health concerns. The discovery comes just before Tuesday's runoff election between Democrat Mike Espy, who is black, and Republican Sen.
MS has a history of racially motivated lynchings and violence against people who sought voting rights for black citizens.
Espy said he refused to accept offers of plea deals. "I was going to vote for Mike Espy anyway".
It was not immediately known who put them there.