The United Opposition, led by party leaders Rigathi Gachagua (DCP), Kalonzo Musyoka (Wiper), and Eugene Wamalwa (DAP-K), claimed an elaborate rigging scheme by the ruling United Democratic Alliance (UDA) ahead of the November 27 by-elections. They alleged that 15,000 pre-marked ballots were dispatched to Mbeere North, among other suspicious activities.

• The United Opposition claims 30,000 pre-marked ballots were dispatched to Magarini, Malava, and Mbeere North constituencies, with 15,000 specifically for Mbeere North.
• Wiper party leader Kalonzo Musyoka stated that 820,000 printed ballots' serialisation was incorrect, creating a loophole for stuffing.
• The Opposition implicated IEBC CEO Marjan Hussein Marjan in the alleged rigging scheme and urged the IEBC to ensure fair elections.
• DCP leader Rigathi Gachagua called for all armed plainclothes officers to be barred from polling stations and committed to deploying opposition agents to oversee the voting process.