Saccone is telling several thousand supporters gathered for a rally with Trump that they must send "an ally of the president" because "we've got a country to save".
In addition to the coming special election, Trump looked back to the 2016 election where he derided a speech made by Senator Elizabeth Warren of MA - whom he called "Pocahontas" - on behalf of Hillary Clinton for being "so angry".
White House counselor Kellyanne Conway campaigned for Saccone on Thursday, though her first appearance at a Pittsburgh "meet and greet" with campaign volunteers attracted fewer than 20 people.
During the campaign event in Pittsburgh, the president also veered off into a list of other topics, including North Korea, his distaste for the news media and his own election victory 16 months ago. "We need our Congressman Saccone, we have to have him", Trump said.
"The Democrats are the party of sanctuary cities", Trump said.
"We [the authorities in Singapore] have a zero tolerance policy ... that means if we catch a drug dealer, death penalty", Trump explained to the crowd, which roared in approval.
Then Trump praised the Republican candidate.
Trump said the United States has been running huge trade deficits, and that a lot of things have to be set straight.
Trump referred to the Democrat as "Lamb the sham", CNN reported.
"These people are killing our kids and they're killing our families, and we have to do something", he said.
However, he did reportedly state: "I don't know if this country's ready for it". Saccone is now going up against Democrat Conor Lamb.
But a rally where Saccone gets more closely associated with Trump and his policies may not have been a bad idea - Trump won the district by double digits in the 2016 election. "There's no one that I would rather have in my corner than President Trump".
"He's going to vote the party line".
Both candidates in Pennsylvania's 18th District, Democrat Conor Lamb and Republican Rick Saccone (suh-KOHN'), have endorsed the tariffs.
Trump said he doesn't "blame" Canada.
"Your steel is coming back. You know, we don't have a big margin".
President Trump told western Pennsylvania voters Saturday that his new tariffs were saving the steel industry and that the US-China relationship was the best it's ever been.
TRUMP: You have to have him. Trump was blunt about that as he stood with Saccone on the stage at the end of the rally. He also went after Rep. Maxine Waters, calling the California Democrat - who has called for Trump's impeachment - a "low-IQ individual".
Republicans say Democrats are benefiting from an "A+ candidate", whereas they have a lackluster option, who's struggled to raise money.
President Trump announced his election campaign slogan will be "Keep America Great!" to thunderous applause. But regardless of the outcome, in this district that Republicans have held a stranglehold on for almost two decades, the fact that this race is so close is in large part because of the unpopularity of one person: Donald J. Trump.
In fact, since Trump took office, Democrats have flipped 39 state legislative seats from red to blue, the last two just a few weeks ago in special elections in New Hampshire and CT.
And if this race is as close as people are predicting, a little boost from the president could make the difference, and, Republicans hope, prevent a political embarrassment heading into the midterms.