In the past, the DPP had close relations with the environmental movement. Opposition to the Fourth Nuclear Power Plant is enshrined in the party platform. Outgoing party chairman Lin Yi-hsiung has said that the new government must oppose the fourth plant or it would face party discipline. He also said, however, that President Chen could opt to try to change the party platform if he wants to go ahead with the plant.
過去民進黨與環保運動關係密切，「反核四」明列在黨綱之中，在「核四」的議題上，民進黨主席林義雄曾表示，新政府必須反對核四，否則將黨紀伺候，但陳水扁也可以選擇以修改黨綱的方式解決這個問題。