Legislator Martin Lee Chu-ming has warned that the rift in the Democratic Party, which he heads, could cost it heavily in September's polls. 'Electors will either stay at home or vote for someone else if the internal conflict continues,' he said. On Thursday, a survey showed the rival Democratic Alliance for the Betterment of Hong Kong had become more popular than the Democrats for the first time, a trend confirmed by an internal Democrat poll. The split in the Democrats between the mainstream faction and the more radical Young Turks broke out afresh this month over the candidate lists for the September election. Leading Young Turk Tsang Kin-shing quit the party as a result. However, Mr Lee said he was confident of long-term support from voters. 'We are brave enough to criticise the Beijing Government,' he added. 'But we are not mere opposers.'