Trump was in Nashville to fight for Bredesen's Republican opponent, Rep. Marsha Blackburn, to replace retired Senator Bob Corker.
"I've never heard of this guy, who is he?" Trump said of Bredesen. "He's an absolute, complete tool from Chuck – from Chuck Schumer – he's a tool from Chuck Schumer and, of course, MS-13 lover Nancy Pelosi."
Bredesen is indeed a popular former Nashville mayor and governor of Tennessee, but he last ran for public office in 2006. He has led Blackburn in recent polls.
Trump arrested Bredesen to Schumer, the minority leader of the Senate, and Pelosi, the House Minority Leader, as well as former Presidents Barack Obama and Hillary Clinton
"If Bredesen were ever elected," Trump said, "he would whatever Chuck and Nancy remember the expression, Chuck and Nancy do not want the wall, they want open borders, they are more interested in looking after criminals than to take care of her ̵
" Crooked Hillary, "Trump added, as the crowd sang" Lock Up. "
Trump also claimed that Pelosi loves "MS-13," the gang whose members Trump claimed to be "deported" by the thousands.
Trump also referred to his reference to members of the MS-13 gang as "animals" in a campaign campaign campaign.
"They are not human. They are not human. And that's why we call the bloodthirsty MS-13 gang members the name I used last week, "said Trump.
" What was the name?
"Animals," answered the crowd.
Trump is also popular in Tennessee, where he beat Hillary Clinton in 2016 and won 61% of votes for Clinton's 35%, a poll recently conducted by Vanderbilt University revealed that Trump has a 53% approval, with 43% disapproving.
The Tennessee race has a major impact on Senate control, where Republicans have a 51-49 majority and a net loss of only The Democrats consider Nevada, Arizona, Tennessee and even potentially Texas as possible pick-ups, but the party also defends 10 seats in the States that Trump won in 2016 – five of which Trump won in the double-digit range.
Corker greeted Trump at the Nashville airport and attended the President's night events when Trump introduced Corker to the rally he was met with audible boos by the audience.
Corker had been a thorn in the side of the Republicans when he became a friend of Bredesen's and offered only a lukewarm approval to Blackburn.
For Trump, the trip to Tennessee comes as part of a booming mid-term travel plan. He recently took to the streets to fight against Senate Democrats, including Joe Donnelly of Indiana and Joe Manchin of West Virginia.
Trump also reiterated his promise of 2016 that Mexico would pay to build a wall along the southern border of the United States.
"In the end, Mexico will pay for the wall, I'm just telling you," he said, referring to negotiations to change the North American Free Trade Agreement.
He blamed the Mexican government for a caravan recently arrived at the US border by American immigrants.
"They are making all this money, and they are doing absolutely nothing to stop people from crossing Mexico from Honduras and all those other countries – the caravan, all these things – they are doing nothing to help us, nothing "added Trump. "They will pay for the wall and they will enjoy it, OK, they will enjoy it, they will not do anything for us."
CNN's Ashley Killough contributed to this report.