"In the end, Mexico is going to pay for the wall", Trump told the crowd. The Tennessee primary, in which she'll face off against former Gov. Phil Bredesen, is August 2. "We need Marsha Blackburn to win".
"He's a tool", Trump repeated, ripping Bredesen, who is challenging Blackburn for the seat being vacated by Sen.
Trump's visit will also set off a scramble for Tennessee's Republican candidates for governor to get face time and presidential shoutouts.
President Trump speaks during a rally in Nashville, Tenn., on Tuesday.
Beyond Indiana, Trump has used his Twitter page to boost California Republican gubernatorial candidate John Cox, hoping to strengthen the party's chances of securing a spot on the ballot in November. The two continued to trade insults past year, with Trump giving the senator the nickname "Liddle Bob Corker" and insisting he wouldn't even be able to get elected "dog catcher" if he tried running for re-election.
The campaign in Tennessee is among several races crucial to Trump's plans to maintain control of the Senate, where Republicans have a two-seat majority.More news: Meghan Markle wedding dress knockoff now on sale
Trump said one of those surrogates who appeared with Clinton on the campaign trail was rapper Shawn "Jay-Z" Carter.
She has backing from President Trump and supports his agenda of immigration and tax reform.
Ruhle then fact-checked the commander-in-chief on job growth, wages, border crossings, Trump's proposed wall, African American voting, and global opinion of the United States. "Sincerely, Mexico (all of us)", Pena Nieto wrote in English.
Tennessee has a history of electing centrist senators and the race could be complicated by Corker's up-and-down relationship with Trump.
The president endorsed Blackburn on Twitter last month, saying Blackburn is "great on the military, border security and crime".
Blackburn, who served on Trump's transition team, has embraced the president and called herself a "hardcore, card-carrying Tennessee conservative". "They do nothing for us".