Former President Barack Obama Barack Hussein ObamaMichelle Obama and Jennifer Lopez exchange Ginsburg memories Pence defends Trump's 'obligation' to nominate new Supreme Court justice The militia menace MORE congratulated Chicago Mayor-elect Lori Lightfoot (D) on Wednesday, calling her win “historic.”

“I know that with our city’s heart and Lori’s leadership, Chicago’s best days are still ahead,” Obama tweeted.

Great to see Chicago’s historic mayoral race between two highly qualified candidates. Congrats to our next mayor, Lori Lightfoot—and Toni Preckwinkle campaigned hard and did us proud. I know that with our city’s heart and Lori’s leadership, Chicago’s best days are still ahead. — Barack Obama (@BarackObama) April 3, 2019

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Lightfoot, a former assistant U.S. attorney, was elected Tuesday with about 74 percent of the vote.

She will become Chicago’s first female African-American mayor and the Windy City will be the largest municipality in the U.S. with an openly gay leader.

Lightfoot will succeed Rahm Emanuel, who served as Obama’s White House chief of staff from 2009 to 2010, when she takes office in May.

Five Democrats running for president in 2020 also congratulated her on her win, including South Bend, Ind. Mayor Pete Buttigieg Pete ButtigiegButtigieg stands in as Pence for Harris's debate practice Hillicon Valley: FBI, DHS warn that foreign hackers will likely spread disinformation around election results | Social media platforms put muscle into National Voter Registration Day | Trump to meet with Republican state officials on tech liability shield Facebook takes down Chinese network targeting Philippines, Southeast Asia and the US MORE, Sen. Kamala Harris Kamala HarrisButtigieg stands in as Pence for Harris's debate practice First presidential debate to cover coronavirus, Supreme Court Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (Calif.), Sen. Cory Booker Cory Anthony BookerBipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE (N.J.), Sen. Amy Klobuchar Amy KlobucharSocial media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (Minn.) and Miramar, Fla., Mayor Wayne Messam.