France has a reputation as an enlargement-hostile country, in particular with regard to Turkey. The referendum in 2005 in which French voters rejected the European constitutional treaty was repeatedly interpreted as a voice for a stop or at least a slow down on enlargement (though Eurobarometre polls suggest that enlargement and Turkey played only a secondary role in the rejection of the treaty). A closer look reveals interesting dynamics, both related to the Western Balkans, but also with regard to Turkey.
For more background read our The French debate on enlargement briefing. In order to learn more about key people determining the French enlargement debate read or download the ESI manual on the French EU enlargement debate.