The primary dispute in Taichung's 5th electoral district has escalated into an open split, with a defeated aspirant leaving the party to run as an independent — bad news for the Democratic Progressive Party's local election prospects.

• Lin Yu-mei announced her withdrawal from the DPP after losing the primary in Taichung's 5th electoral district, and will continue her run for city councillor as an independent.
• She alleged that the primary was manipulated by factions working in concert with former Taiwan People's Party figures who had defected to the DPP, and said she had anticipated more than a year ago that the outcome was pre-arranged.
• The district elects six seats. The Kuomintang is fielding three candidates, while four DPP contenders were originally competing for three nominations; there is now an additional independent rival splitting the vote.
• The defection comes at a time when Lai Ching-te's remarks on flood control in southern Taiwan have drawn a backlash from the opposition and pressure within the party is mounting.

Outlook: The Green camp's vote base in this district is expected to be split, and further departures by primary losers unwilling to accept the results are likely to recur ahead of the year-end elections.