Neither U.S. Rep. Kendrick Meek nor his mother, Carrie -- the first person elected to the seat when it was redrawn in 1992 -- faced more than token opposition, if any.
But now Meek is running for U.S. Senate, and the nine other Democrats vying for his seat are working without a road map to model their races. Forced to devise their own strategies, the campaigns have not focused on capturing votes in the entire district, a safe Democratic seat that stretches from Overtown to Pembroke Pines.
Instead, they are carving out niches, trying to muster just enough votes to eke out a victory in the Aug. 24 primary. The winner will face attorney Roderick Vereen, running without party affiliation, in November.
With so many candidates splintering the vote, one candidate would win the primary with as little as 15 percent of the ballots cast, said Kevin A. Hill, an associate professor of political science at Florida International University.
"Anything could happen in that election,'' he said. "It's a total crapshoot.''
The race is also unpredictable because the district's more than 600,000 residents are as diverse as they come. A majority of voters are black -- mostly African American, though the district has the largest concentration of Haitian Americans in the country -- and there are pockets of whites and Hispanics.
"This election may answer whether it's an African-American seat, a Haitian seat or probably a bit of everything,'' said Mitch Ceasar, chairman of the Broward Democratic Party.
With Meek opting not to endorse anyone in the primary, the candidates have worked to shore up their natural bases as they crunch numbers to determine which is the district's biggest voting bloc.
Frederica Wilson has relied on an existing network in her Florida Senate district, which overlaps with much of the congressional district. The same is true for state Reps. James Bush III and Yolly Roberson and former state Rep. Phillip Brutus. To complicate allegiances further: Brutus and Roberson used to be married to each other.
None of those districts encompass all of Miami Gardens, home to two other candidates: Mayor Shirley Gibson and Councilman André Williams. As the third-largest city in Miami-Dade and the state's largest predominantly African-American city, a well-known official could amass enough votes to win with little need of support from elsewhere.
The same is not true for smaller cities like North Miami, where candidate Scott Galvin is a councilman. As the only white candidate in the race, he could collect votes in Miami Shores, North Miami Beach and Aventura.
Haitian Americans -- who depending on varying estimates make up between an eighth and a quarter of the vote in the district -- could swing the election.
Yet it is unlikely for Haitian Americans to vote as a unified bloc, with four Haitian-born candidates in the running: Brutus, Roberson, activist Marleine Bastien and entrepreneur Rudolph "Rudy'' Moise.
Looking elsewhere for support, Bastien, founder of Haitian Women of Miami, has tried to rally like-minded activists and the female vote. Moise, running with deep pockets after putting more than $1 million of his own money into the race, has gone on TV and sent campaign mailers to become better known.
His media campaign could reach some voters in Miramar, Pembroke Pines and Hollywood, which together comprise about a third of the district. Hollywood Mayor Peter Bober recently endorsed Moise, citing his "real-world experience.''
"The key for the candidates is to somehow make sure Broward does not believe itself to be a stepchild of the district,'' Ceasar said. "If that occurs, then the risk becomes greater that the turnout in the Broward portion is exceedingly low.''
Turnout is expected to be low everywhere. In 2006, the last time Meek drew a primary opponent, about 36,000 people -- or 16 percent -- of the district's 220,000 registered Democrats voted.
This time around the seat is more competitive, but some campaigns and political observers say a candidate could still win with as few as 10,000 votes.
That makes relying on one group for support particularly risky.
And, of course, whoever is elected will have to represent everyone in the diverse district. That tall order could mean a streak of competitive elections among Democrats battling for the seat in the future.
"It is difficult,'' said Dario Moreno, an associate professor of political science at FIU. "That's why the Meeks were so successful.''