Election 2024 updates: With Arizona, Trump sweeps all 7 swing states

Ukrainian President Volodymyr Zelenskyy said he spoke with former President Donald Trump on Wednesday and "congratulated him on his historic landslide victory."

"His tremendous campaign made this result possible. I praised his family and team for their great work," Zelenskyy said.

"We agreed to maintain close dialogue and advance our cooperation," Zelenskyy continued. "Strong and unwavering U.S. leadership is vital for the world and for a just peace."

In a phone call Wednesday, President Joe Biden congratulated former President Donald Trump and invited him to the White House "to ensure a smooth transition" between the two administrations, Trump campaign spokesperson Steven Cheung said.

"President Trump looks forward to the meeting, which will take place shortly, and very much appreciated the call," Cheung said.

It is not yet clear when the meeting will take place.

-ABC News' Katherine Faulders

Control of the House of Representatives is still up in the air, and while ABC News has projected that Republicans will win the Senate, we don't know how large their majority will be. Those things both have huge implications on how much of his agenda President-elect Trump will be able to get passed.

Accordingly, we at 538 are tracking the dozens of congressional races that are still undecided over at our new live blog. Join us there for live updates, analysis and commentary until the last major race is decided. Meanwhile, our colleagues at ABC News will continue to update this live blog with reactions from last night's results.

-Nathaniel Rakich

In a statement Wednesday evening, former President Barack Obama and first lady Michelle Obama congratulated former President Donald Trump and Sen. J.D. Vance on their election victory.

"This is obviously not the outcome we had hoped for, given our profound disagreements with the Republican ticket on a whole host of issues," they wrote. "But living in a democracy is about recognizing that our point of view won’t always win out, and being willing to accept the peaceful transfer of power."

The Obamas said they "could not be prouder" of Vice President Kamala Harris and Minnesota Gov. Tim Walz, who they lauded as "two extraordinary public servants who ran a remarkable campaign."

"In a country as big and diverse as ours, we won’t always see eye-to-eye on everything. But progress requires us to extend good faith and grace -- even to people with whom we deeply disagree," the statement read. "That’s how we’ve come this far, and it’s how we’ll keep building a country that is more fair and more just, more equal and more free."