Democratic presidential candidate Hillary Clinton and her running mate Tim Kaine are on a three-day bus tour through the Rust Belt battlegrounds of Pennsylvania and Ohio.

Democratic presidential candidate Hillary Clinton and her running mate Tim Kaine are on a three-day bus tour through the Rust Belt battlegrounds of Pennsylvania and Ohio.

Hillary Clinton kicked off a three-day, swing-state bus tour on Friday with a rally here in the same city where she accepted the Democratic party’s presidential nomination Thursday night.

“We’ve had a great convention but now we’ve got to go out and fight for our vision of America,” Clinton told the crowd at Temple University.

Clinton, the first woman to be a major-party presidential nominee, was joined by her running mate, Sen. Tim Kaine (Va.). Clinton said that, after her excitement from the night wore off, she was struck by the seriousness of the campaign ahead of her.

“It was also kind of overwhelming,” Clinton said. “I take deeply and with great humility the responsibility that this campaign imposes on us.”

The two parties’ conventions could not have been more different, Clinton added.

Watch Democratic presidential nominee Hillary Clinton's speech at the Democratic National Convention in Philadelphia. Clinton spoke about domestic policy, national security and beating Republican presidential nominee Donald Trump. (Video: Victoria Walker/The Washington Post;Photo: Michael Robinson Chavez/The Washington Post)

“We might as well have been talking about two different countries… or two different planets,” she said, noting that the Republican convention in Cleveland last week painted a “negative, dark picture of a country in decline.”

“I’m not satisfied with the status quo. I’m not telling you everything is peachy keen,” Clinton said. “We’ve made progress but we have work to do if we’re to make sure everybody is included.”

Clinton’s Republican opponent, Donald Trump, will hold campaign events Friday in Colorado Springs and Denver, Colo. His running mate, Indiana Gov. Mike Pence will speak in Lima, Ohio.

[Winners and losers from the final night of the Democratic convention]

On Friday morning, Trump responded to Clinton with a string of messages posted on Twitter, including one that said Clinton “‘forgot’ to mention the many problems of our country, in her very average scream!”

Trump also attacked two other speakers from the Democratic convention: former New York mayor Michael Bloomberg, and retired Marine Corps Gen. John Allen, who on Thursday rebuked Trump by saying that “our armed forces will not become an instrument of torture.” Trump has called for the return of “waterboarding,” and proclaimed “torture works.”

Allen, Trump wrote in a tweet, “failed badly in his fight against ISIS. His record = BAD.”

1 of 14 Full Screen Autoplay Close Skip Ad × The most memorable moments from the Republican and Democratic conventions View Photos From a tender moment between President Obama and Hillary Clinton to Trump’s flashy entrance, here’s a look at top moments from the conventions. Caption From a tender moment between President Obama and Hillary Clinton to Trump’s flashy entrance, here’s a look at top moments from the conventions. Democratic National Convention President Obama embraces presidential nominee Hillary Clinton at the Democratic National Convention in Philadelphia after endorsing her and imploring the public to “reject fear, to summon what’s best in us.” Melina Mara/The Washington Post Buy Photo Wait 1 second to continue.

At the same time that Clinton was speaking on Thursday, Reuters reported that the FBI was investigating a hacking intrusion at the Democratic Congressional Campaign Committee. Individuals close to the matter told The Washington Post that the intrusion appeared to be carried out by the same Russian intelligence service that hacked the Democratic National Committee.

[FBI probes suspected breach of another Democratic organization by Russian hackers]

Earlier this week, Trump called on the Russian government to carry out a cyberattack on Clinton herself, to find emails that Clinton stored on a private server while she was secretary of state. That appeared to be a new twist in an American presidential campaign, one candidate asking another country’s spy service to help his cause and damage his opponent’s. He later said he was being sarcastic.

On Friday, Kaine attacked Trump’s comments about Russia in an interview on CNN’s “New Day.”

“Donald Trump did something that was just completely out of any historical precedent this week when he basically asked Russia, ‘hey, put your thumb on the scale of an American election,’” Kaine said on CNN.

“He said, Russia should help me try to figure out if I can get an edge or a drop on Hillary Clinton,” Kaine said. “It really was outrageous.”

Kaine, a member of the Senate Armed Services and Foreign Relations committees, added that “we have it dead, solid, cold that Russia does get engaged in trying to influence elections in other countries, whether it’s supporting parties that are pro-Russia and to their liking in other nations, or even using cyber-attacks to create chaos on Election Day.”

Clinton and Kaine will now travel by bus through Pennsylvania and Ohio, two states that are critical battlegrounds in the November election.

“This is the part of the campaign that I really like,” Kaine said in Philadelphia Friday. “I don’t like wearing a tie that much. I’d rather go out and pound the pavement.”

They will focus on the economic concerns of working class voters in the rust belt, a key group that may lean toward Trump.

According to a Clinton aide, as they kick off their tour in Hatfield, Pa., later in the day, they will visit a toy manufacturing facility to promote Clinton’s policies for STEM jobs.

Clinton pledged that in her first 100 days she would “break through the gridlock in Washington” to push a jobs plan that would be the biggest investment in new jobs since World War II.

The plan would focus on infrastructure, technology, clean energy, and advanced manufacturing jobs, Clinton added.

“I’m also going to pay special attention to those parts of our country that have been left out and left behind,” she said.

In her address to the convention Thursday evening, Clinton had sought to transcend doubts about her character by presenting an uplifting vision for the nation’s future, delivering the biggest speech of her enduring public life here Thursday as she formally accepted the Democratic presidential nomination.

Declaring that the United States is at “a moment of reckoning,” Clinton promised that “progress is possible” and offered herself as a fearless executive who would get the job done. She also warned against what she considers the dangers represented by Trump, who she said would usher in “midnight in America.”

“Powerful forces are threatening to pull us apart,” she said. “Bonds of trust and respect are fraying. And just as with our founders, there are no guarantees. It truly is up to us. We have to decide whether we all will work together so we all can rise together.”

The candidate delivered a scathing, although at times humorous, dressing-down of Trump and his polarizing brand of politics, declaring that as president she would neither ban a religion nor build a wall to keep immigrants out of the country.

“He’s taken the Republican Party a long way, from ‘Morning in America’ to ‘Midnight in America,’ ” Clinton said, the former a reference to Ronald Reagan’s 1984 campaign theme. “He wants us to fear the future and fear each other. . . . We are clear-eyed about what our country is up against. But we are not afraid. We will rise to the challenge, just as we always have.”

Throughout the speech there were spasms of protest and boos — some people unfurled banners reading “#WIKILEAKS” and “KEEP YOUR PROMISES” — which were mostly drowned out by shouts of “Hill-a-ry.” The scene served as a reminder that Clinton is continually trailed by those who find her objectionable, even when accepting her party’s nomination.

Clinton narrated the crusades of her nearly five decades in public service from an idealistic young activist lawyer to a globe-trotting diplomat. She cited not only her years in government, but also her personal experiences as a woman, as qualifications to be president.

She made no explicit reference to the controversies that have dogged her campaign, chief among them her use of a private email server as secretary of state, but cast herself as resilient in the face of challenges: “More than a few times, I’ve had to pick myself up and get back in the game.”

The former secretary of state offered what she hopes will be an unimpeachable rationale to restive voters for keeping the White House in Democratic hands by distilling what she would do on issues foreign and domestic, how she would build on President Obama’s legacy and why she thinks Trump is temperamentally unfit to hold the office.

“He loses his cool at the slightest provocation,” Clinton said. “When he’s gotten a tough question from a reporter. When he’s challenged in a debate. When he sees a protester at a rally. Imagine him in the Oval Office facing a real crisis. A man you can bait with a tweet is not a man we can trust with nuclear weapons.”

Addressing the urgent threat of Islamic State terrorists, Clinton said, “Anyone reading the news can see the threats and turbulence we face. . . . So it’s no wonder people are anxious and looking for reassurance — looking for steady leadership.”

Of her opponent, she added: “Now Donald Trump says, and this is a quote, ‘I know more about ISIS than the generals do.’ No, Donald, you don’t.”

At times, her speech felt like a president’s State of the Union address, ticking through a litany of policy promises that were bound to please nearly every Democratic constituency and interest group — including jobs, gun control, infrastructure and health care.

An underlying theme of Clinton’s address was that progress can be achieved only if people work together — a direct rebuke to Trump’s pledge that he alone can fix what ails the nation.

“Every generation of Americans has come together to make our country freer, fairer and stronger,” she said. “None of us ever have or can do it alone. I know that at a time when so much seems to be pulling us apart, it can be hard to imagine how we’ll ever pull together. But I’m here to tell you tonight: Progress is possible.”