Chu was tapped by President Ma Ying-jeou to be the Vice Premier to Wu Den-yih on 7 September 2009, in a reshuffling of the Executive Yuan due to the slow disaster response to Typhoon Morakot [REF].
On 13 May 2010, Chu submitted his resignation to Premier Wu to run for mayor of the newly created New Taipei City, the successor of Taipei County [REF].