Dueling endorsements from veteran African-American politicians dominated the race for mayor of Chicago on Monday.

U.S. Rep. Danny Davis lined up behind his West Side neighbor, Cook County Commissioner and Chicago Teachers Union organizer Brandon Johnson.

Retiring Ald. Roderick Sawyer (6th) chose Paul Vallas, becoming the first of seven mayoral challengers to choose sides in the April 4 runoff.

Johnson and Vallas are in a fierce competition for the African-American votes. In the first round, most of those were won by lame-duck Mayor Lori Lightfoot and millionaire businessman Willie Wilson.

Davis’ endorsement helped Lightfoot sweep Chicago’s Black wards, including Davis’ home 29th Ward on the West Side. But it couldn’t spare Lightfoot from a humiliating defeat that makes her just the third elected mayor since Prohibition to be denied a second term.

Sawyer finished with just 0.4% of the citywide vote, and didn’t even carry his own South Side ward, receiving just 2.7% of votes there.

The value of both endorsements may or may not move the needle, but every little bit helps.

During a news conference outside the Harold Washington Library, Davis described Johnson as “fair-minded” and said he is confident his West Side neighbor will “represent every part of the city.”

At 46, Johnson is also “the right age, full of energy, full of talent, full of responsibility” that will be needed to take on the formidable challenges awaiting Chicago’s next mayor, Davis said.

“I want a mayor who is a creative thinker. Who thinks beyond where we have been, but thinks in terms of where we need to go,” Davis told reporters.

“Brandon Johnson has the talent, the skill, the ability to group around him all of the experts that he will need in every area. … What I really like the most is that Brandon Johnson will involve the citizens of Chicago in making decisions about what our city should be. It won’t just be the aldermen. It will be the aldermen and the people all working together on one accord. … I can’t hardly wait for him to march in to that 5th-floor office and say, ‘Here we are Chicago, ready for a new day, a new person.’”

Davis said he knows Vallas and worked with him when Vallas served as then-Mayor Richard M. Daley’s budget director.

“The difference between Brandon, myself and Paul is that Brandon and myself were teachers. Paul was a manager,” Davis said.

“The difference is Brandon walks and talks with the people each and every day and has the ability to understand their pain, their hurt, their frustration. Paul brings whatever attributes that he has. But, I would have Brandon Johnson any day. Paul will be my friend. I’ll know him. … But Brandon is the candidate that I’d like to see on the 5th floor” of City Hall.

Sawyer joins retired Illinois Secretary of State Jesse White and White’s political protégé, Ald. Walter Burnett (27th), in the Vallas camp.

“Brandon’s a good man. I have nothing bad to say about him. I just think that my politics are different than what his vision for the future is,” Sawyer told the Sun-Times Monday.

One big difference of opinion is on Johnson’s “tax the rich” plan to raise $800 million and use those funds on an array of programs.

“I’m not a big fan of the tax plan. I’m not engaged about the head tax. I just don’t think that will bring our city forward. It will actually take us back. Those are a lot of the things that we fought against when I first got into office. It would be the antithesis of stuff that I would advocate for,” Sawyer said.

Sawyer also is concerned Johnson’s CTU connection could pose a conflict, given that Johnson would be negotiating with the teachers union when its contract expires next year. Bersides $1 million in contributions, the union provided hundreds of foot soldiers to help get out the vote Feb. 28.

“The teachers union is becoming way too political,” said Sawyer, son of former Mayor Eugene Sawyer.

Although Johnson no longer talks about “defunding” the police, Sawyer said he is equally concerned about Johnson’s refusal to commit to filling the 1,700 police vacancies or fully funding the Chicago Police Department’s $1.94 billion budget.

In fact, Johnson wants to cut at least $150 million from the CPD budget by reducing the ratio of supervisors to rank-and-file officers and make the shortage of officers worse by promoting 200 detectives.

“When Johnson talked about moving up detectives, I didn’t see a real plan to replace those officers. I don’t want to take more officers off the street to do that,” Sawyer said.

Sawyer said he has no doubt Vallas will get the 20% to 25% percent of the Black vote he needs to win the runoff. His only concern is how ugly and racially divisive the race might get.

“That is dangerous,” Sawyer said. “We should be focusing on issues and not continue to fan those flames of race.”

Contributing: Ashlee Rezin