WILMINGTON, Del./WASHINGTON (Reuters) - President-elect Joe Biden declared it was “time to heal” a deeply divided America in his first speech after winning in a bitter election, even as President Donald Trump refused to concede and pressed ahead with legal fights against the outcome.

Biden’s victory on Saturday in Pennsylvania put him over the threshold of 270 Electoral College votes he needed to clinch the presidency, ending four days of nail-biting suspense and sending his supporters into the streets of major cities in celebration.

“The people of this nation have spoken. They have delivered us a clear victory, a convincing victory,” Biden told honking and cheering supporters in a parking lot in his hometown of Wilmington, Delaware.

The Democrat pledged that as president he will seek to unify the country and “marshal the forces of decency” to battle the COVID-19 pandemic, rebuild economic prosperity, secure healthcare for American families and root out systemic racism.

Without addressing his Republican rival, Biden spoke directly to the 70 million Americans who cast ballots in support of Trump, some of whom took to the streets on Saturday to demonstrate against the results.

“For all those of you who voted for President Trump, I understand the disappointment tonight. I’ve lost a couple times myself. But now, let’s give each other a chance. It’s time to put away the harsh rhetoric, lower the temperature, see each other again, listen to each other again,” he said.

“This is the time to heal in America.”

He also thanked Black voters, saying that even at his campaign’s lowest moments, the African American community had stood up for him. “They always have my back, and I’ll have yours,” he said.

Biden was introduced by his running mate, U.S. Senator Kamala Harris, who will be the first woman, the first Black American and the first American of Asian descent to serve as vice president, the country’s No. 2 office.

“What a testament it is to Joe’s character that he had the audacity to break one of the most substantial barriers that exists in our country, and select a woman as his vice president,” Harris said.

Congratulations poured in from abroad, including from conservative British Prime Minister Boris Johnson, Canadian Prime Minister Justin Trudeau, German Chancellor Angela Merkel and Israeli Prime Minister Benjamin Netanyahu, making it hard for Trump to push his repeated claims, without evidence, that the election was rigged against him.

Trump, who was golfing when the major television networks projected his rival had won, immediately accused Biden of “rushing to falsely pose as the winner.”

“This election is far from over,” he said in a statement.

Trump has filed a raft of lawsuits to challenge the results, but elections officials in states across the country say there has been no evidence of significant fraud, and legal experts say Trump’s efforts are unlikely to succeed.

As the news of his win broke, cheers and applause were heard around Washington, with people emerging onto balconies, honking car horns and banging pots. Throngs of people streamed to the White House to rejoice outside a security fence as the sound of fireworks boomed in the distance.

Trump supporters reacted with a mix of disappointment, suspicion and resignation, highlighting the difficult task that Biden faces winning over many Americans, especially in more rural areas, who believe Trump was the first president to govern with their interests at heart.

“It’s sickening and sad,” said Kayla Doyle, a 35-year-old Trump supporter and manager of the Gridiron Pub on Main Street in the small town of Mifflintown, Pennsylvania. “I think it’s rigged.”

Angry pro-Trump “Stop the Steal” demonstrators gathered at state capitol buildings in Michigan, Pennsylvania and Arizona. Protesters in Phoenix chanted “We want audits!” One speaker told the crowd: “We will win in court!”

There were isolated instances of Trump and Biden supporters confronting each other, as occurred between two groups of about 100 each in Harrisburg, Pennsylvania, but there were no immediate reports of the violence many had feared. The pro-Trump protests mostly faded as the results sank in.

Former and present political leaders also weighed in, including congratulations from former Democratic President Barack Obama, for whom Biden served as vice president, and Republican U.S. Senator Mitt Romney. Trump ally Senator Lindsey Graham called on the Justice Department to investigate claims of voting irregularities.

Trump’s allies made it clear the president does not plan to concede anytime soon. One Trump loyalist said the president was not ready to admit defeat even though there would not be enough ballots thrown out in a recount to change the outcome. “There’s a mathematical certainty that he’s going to lose,” the loyalist said.

Biden’s win ends Trump’s chaotic four-year presidency in which he played down a deadly pandemic, imposed harsh immigration policies, launched a trade war with China, tore up international agreements and deeply divided many American families with his inflammatory rhetoric, falsehoods and willingness to abandon democratic norms.

For Biden’s supporters, it was fitting that Pennsylvania ensured his victory. He was born in the industrial city of Scranton in the state’s northeast and, touting his middle-class credentials, secured the Democratic nomination with a promise to win back working-class voters who had supported Trump in 2016.

He launched his campaign in Pittsburgh last year and wrapped it up with a rally there on Monday. It was a tight race in industrial states such as Pennsylvania, Michigan, Wisconsin and Minnesota, but Biden did enough to prevail.

He faced unprecedented challenges. These included Republican-led efforts to limit mail-in voting at a time when a record number of people were due to vote by mail because of the pandemic, which has killed more than 237,000 people in the United States.

When Biden enters the White House on Jan. 20, the oldest person to assume the office at age 78, he likely will face a difficult task governing in a deeply polarized Washington, underscored by a record nationwide voter turnout.

Both sides characterized the 2020 election as one of the most crucial in U.S. history, as important as votes during the 1860s Civil War and the 1930s Great Depression.

Biden’s victory was driven by strong support from groups including women, African Americans, white voters with college degrees and city-dwellers. He beat Trump by more than four million votes in the nationwide popular vote count.

Biden, who has spent half a century in public life as a U.S. senator and vice president, will inherit a nation in turmoil over COVID-19 and the related economic slowdown, as well as protests against racism and police brutality.

Biden has said his first priority will be developing a plan to contain and recover from the pandemic, promising to improve access to testing and, unlike Trump, to heed the advice of leading public health officials and scientists.

In addition to taming the health crisis, Biden faces a huge challenge remedying the economic hardship it has caused. Some 10 million Americans thrown out of work during coronavirus lockdowns remain idled, and federal relief programs have expired.

Biden also has pledged to restore a sense of normalcy to the White House after a presidency in which Trump praised authoritarian foreign leaders, disdained longstanding global alliances, refused to disavow white supremacists and cast doubt on the legitimacy of the U.S. election system.

Despite his victory, Biden will have failed to deliver the sweeping repudiation to Trump that Democrats had hoped for, reflecting the deep support the president still retains.

This could complicate Biden’s campaign promises to reverse key parts of Trump’s legacy. These include deep Trump tax cuts that especially benefited corporations and the wealthy, hardline immigration policies, efforts to dismantle the 2010 Obamacare healthcare law and Trump’s abandonment of such international agreements as the Paris climate accord and Iran nuclear deal.

Should Republicans keep control of the U.S. Senate, they would likely block large parts of his legislative agenda, including expanding healthcare and fighting climate change. That prospect could depend on the outcome of four undecided Senate races, including two in Georgia that will not be resolved until runoffs in January.

For Trump, 74, it was an unsettling end after an astonishing political rise. The real estate developer who established a nationwide brand as a reality TV personality upset Democrat Hillary Clinton to win the presidency in 2016 in his first run for elected office. Four years later, he becomes the first U.S. president to lose a re-election bid since Republican George H.W. Bush in 1992.

In the end, though, Trump failed to significantly widen his appeal beyond a committed core of rural and working-class white voters who embraced his right-wing populism and “America First” nationalism.

Duane Fitzhugh, a 52-year-old teacher celebrating Biden’s victory outside the Trump Hotel in Washington, said it was as if an evil enchantment was being lifted.

“It’s like a pall fell over the country four years ago and we’ve been waiting years for it to end,” he said.—Reuters