In his first speech after securing the White House, President-elect Joe Biden is making an appeal to supporters of President Donald Trump.

Biden said Saturday night in Wilmington, Delaware, that “this is the time to heal in America” and pledged to be a president to represent even those who didn’t support him.

Noting ”I’ve lost a couple times myself,” Biden said, “now, let’s give each other a chance.”

Trump has not conceded the race to Biden, pursuing legal challenges over ballot counts in several states.

Biden used his acceptance speech as an olive branch to those who did not vote for him, telling Trump voters that he understood their disappointment but adding, “Let’s give each other a chance.”

“It’s time to put away the harsh rhetoric, to lower the temperature, to see each other again, to listen to each other again, to make progress, we must stop treating our opponents as our enemy,” he said. “We are not enemies. We are Americans.”

Biden, 77, staked his candidacy less on any distinctive political ideology than on galvanizing a broad coalition of voters around the notion that Trump posed an existential threat to American democracy. The strategy, as well as an appeal to Americans fatigued by Trump’s disruptions and wanting a return to a more traditional presidency, proved effective and resulted in pivotal victories in Michigan and Wisconsin as well as Pennsylvania, onetime Democratic bastions that had flipped to Trump in 2016.

Kamala Harris made history as the first Black woman to become vice president, an achievement that comes as the U.S. faces a reckoning on racial justice. The California senator, who is also the first person of South Asian descent elected to the vice presidency, will become the highest-ranking woman ever to serve in government, four years after Trump defeated Hillary Clinton.

Harris introduced Biden at their evening victory celebration as “a president for all Americans” who would look to bridge a nation riven with partisanship and she nodded to the historic nature of her ascension to the vice presidency.

“Dream with ambition, lead with conviction and see yourselves in a way that others may not simply because they’ve never seen it before,” Harris told Americans. “You chose hope and unity, decency, science and, yes, truth … you ushered in a new day for America.”

After he spoke, the cars at the drive-in rally — a pandemic campaign invention — began to honk their horns and a fireworks display lit up the night sky. Biden was on track to win the national popular vote by more than 4 million, a margin that could grow as ballots continue to be counted.