Speaking at a public forum on Sunday, Duale said such remarks risk creating unnecessary divisions in a city that has grown through the contributions of many communities.
He warned that Nairobi does not belong to one group and should never be treated as political territory for any single region.
Duale said Nairobi’s diversity is one of its biggest strengths and urged leaders to promote unity rather than regional dominance.
He noted that different communities have lived, worked, and built businesses together in the capital for decades.
“The success of Nairobi comes from all Kenyans,” Duale said. “No community can claim ownership of the city.”
The Cabinet Secretary accused Gachagua of using ethnic politics to gain political mileage, adding that such rhetoric could damage peaceful coexistence.
He specifically cited long-standing business ties between communities in areas like Eastleigh, saying cooperation, not division, has driven economic growth.
Duale challenged the former deputy president to focus on national unity, reminding leaders that Kenya’s constitution promotes inclusivity and equal opportunity for all citizens regardless of background.
His remarks came shortly after Gachagua dismissed claims of internal competition among opposition groups in Nairobi.
Gachagua insisted that the opposition remained united and would support each other based on political strength in various regions.
According to Gachagua, Wiper Party leader Kalonzo Musyoka would play a key role in shaping the opposition’s strategy in Nairobi due to his experience in national politics.
He said opposition parties would avoid internal conflict and instead focus on supporting strong candidates across party lines.
“In areas where Wiper is strong, we will support them. Where my party is strong, we expect the same support,” Gachagua said during a separate address.
He also invited ODM leaders to work with the opposition alliance ahead of the 2027 elections, saying unity was necessary to challenge President William Ruto’s government.
However, Gachagua later clarified earlier reports suggesting his party planned to take over top Nairobi seats, including governor and senator positions.
Kalonzo Musyoka dismissed those reports, calling them misleading and politically motivated.
Political analysts say the exchange between Duale and Gachagua highlights rising tensions as early campaigns for 2027 begin to take shape.
They warn that leaders must be careful with their words, especially in a city as diverse as Nairobi.
