The first person to ask is your PhD advisor and the head of your department at your university. The history of collaboration between your institution and the French institution is taken into account during the selection process.
If your institution does not have any collaboration with a French institution or if you want to start a new collaboration with another French institution, please visit Campus France USA’s website for more information about French institutions and PhD programs: http://www.usa.campusfrance.org/en/
We encourage students to connect with professors in France who already have some contacts with the American supervisors. If there is no such contact, we strongly recommend that you discuss your research project well in advance (at least a semester) with your French professor.