Barack Obama congratulated his former vice president, Joe Biden, and his running mate, Sen. Kamala Harris, after Biden was projected to win the presidency Saturday.

"I could not be prouder to congratulate our next President, Joe Biden, and our next First Lady, Jill Biden," Obama said in a statement. "I also couldn't be prouder to congratulate Kamala Harris and Doug Emhoff for Kamala's groundbreaking election as our next Vice President."

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"[O]nce every vote is counted, President-Elect Biden and Vice President-Elect Harris will have won a historic and decisive victory," he continued.

The 44th president hit the campaign trail for Biden in the final stretch of the race, though Obama did not endorse his former running mate until April when the Democratic presidential primary was effectively over, something that President Trump used to criticize Biden.

Former President Barack Obama speaks at a rally as he campaigns for Democratic presidential candidate former Vice President Joe Biden Tuesday, Oct. 27, 2020, in Orlando, Fla. (AP Photo/John Raoux)

Former President Barack Obama speaks at a rally as he campaigns for Democratic presidential candidate former Vice President Joe Biden Tuesday, Oct. 27, 2020, in Orlando, Fla. (AP Photo/John Raoux)

"The election results at every level show that the country remains deeply and bitterly divided. It will be up to not just Joe and Kamala, but each of us, to do our part -- to reach out beyond our comfort zone, to listen to others, to lower the temperature and find some common ground from which to move forward, all of us remembering that we are one nation, under God," Obama said in his statement on Saturday.

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The Fox News Decision Desk projected Saturday that Biden will win the state of Nevada and the commonwealth of Pennsylvania, giving the Democrat the electoral votes he needs to win the White House.

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Fox News' Tyler Olson, Brooke Singman and Paul Steinhauser contributed to this report.