In Georgia, a Democratic lawmaker planning a run for governor promises to confront President Trump and what she calls the “fascists” surrounding him. In Maryland, a former president of the N.A.A.C.P. warns national Democrats not to take African-Americans for granted. The mayor of Tallahassee, Fla., goes even further, declaring that Democrats have failed by fixating on centrist voters.
In states from Massachusetts to Florida, a phalanx of young black leaders in the Democratic Party is striding into some of the biggest elections of 2018, staking early claims on governorships and channeling the outcry of rank-and-file Democrats who favor all-out battle with Mr. Trump and increasingly question his legitimacy as president.
By moving swiftly into the most contentious midterm races, these candidates aim to cement their party in forceful opposition to Mr. Trump and to align it unswervingly with minority communities and young people. Rather than muting their differences with the Republican Party in order to compete in states Mr. Trump won, like Georgia and Florida, they aim to make those distinctions starker.
And, these Democrats say, they are willing to defy the conventional strategic thinking of the national party establishment, which has tended to recruit moderate, white candidates for difficult races and largely failed to help blacks advance to high office under President Barack Obama.
Stacey Abrams, the Democratic leader in the Georgia House of Representatives and a likely candidate for governor, said Democrats would win by confronting a president who was viewed with fear and hostility by the party’s base.
Rather than pivoting to the center, Ms. Abrams, 43, said Democrats should redouble their focus on registering and energizing blacks, Hispanics and Asian-Americans, as well as young and low-income voters, who often decline to participate in politics.
“There is a hunger for representation,” Ms. Abrams said in an interview. “There is a desire to make certain the state starts to serve everyone.”
At a “Macon Resists” town hall event in central Georgia last month, Ms. Abrams appealed to an auditorium of anxious Democrats with just that approach. The state, she said, is speeding toward a political crossroads, with Republicans “terrified of the evolving nature of our state.”
“We can either move forward or we can let the president, and those fascists that surround him, pull us backwards,” she said. “I plan to go forward.”
Ms. Abrams, who filed paperwork this month to explore a run for governor, spent much of the event explaining the wrangling of the Georgia legislature in cool, pragmatic terms. But in the interview, she was adamant that Democrats could not “fake a conservative bent” in order to win the next election in her state, which voted for Mr. Trump by about six percentage points.
“A Democrat wins an election in Georgia by speaking truth to power,” she said.
In other states, black Democratic leaders have been just as pointed in their calls for the party to try something new. Benjamin T. Jealous, a former president of the N.A.A.C.P., is exploring a campaign for governor of Maryland while warning the national party that minority voters could stay home if they are not inspired. Andrew Gillum, the mayor of Tallahassee and a declared candidate for governor of Florida, said Democrats had repeatedly erred by failing to “lean into our base” and by chasing votes nearer to the center instead.
These candidates have brandished data indicating that black turnout slumped in 2016, the first presidential election in a dozen years without Mr. Obama on the ballot: The Census Bureau found that black turnout last year dropped sharply from 2012.
The field of states where youthful black Democrats are competing in 2018 is likely to expand: In Massachusetts, Setti Warren, the 46-year-old mayor of Newton, is gearing up for a race against Gov. Charlie Baker, a hugely popular Republican. African-American candidates are more tentatively considering statewide races in Illinois, Nevada and Ohio. And in Virginia’s off-year elections, Justin Fairfax, a 38-year-old former prosecutor, is the favorite to become the Democratic nominee for lieutenant governor.
A handful of somewhat older black leaders may also test their odds in 2018: Carl Brewer, 60, a former mayor of Wichita, is running for governor in deeply conservative Kansas, and in Maryland, Rushern Baker, the 58-year-old Prince George’s County executive, may also seek the Democratic nomination to challenge Gov. Larry Hogan, a Republican with strong poll ratings.
In Florida, where Democrats have not won a governor’s race since 1994, Mr. Gillum, 37, said it was time to discard a losing formula: The party has typically nominated candidates for governor who are white, moderate and from the Tampa area.