The treaty enjoys large majority support in the European Parliament as it extends the involvement of directly elected representatives in both the European and national parliaments to practically all areas of EU lawmaking.
Eiropas Parlamentā līgumam ir plašs atbalsts, īpaši tādēļ, ka līgums praktiski visās ES likumdošanas jomās vairāk iesaistīs gan Eiropas, gan nacionālos parlamentus.