In late 2018, Renson, Aurélien Taché and Matthieu Orphelin convened a group of around 20 members of the LREM parliamentary group with a "wish to express a humanist, social and ecological sensibility and to better raise citizens' concerns"; the initiative was widely interpreted as the launch of a left-wing faction within the group.[6] In 2020, he joined forces with Barbara Pompili as co-founder of En Commun, a group of centre-left LREM politicians.[7]
In February 2022, Renson announced he would not seek reelection to a second term as an MP. In his announcement, he heavily criticised the lack of internal debate within the outgoing parliamentary majority, stating: "When we all think the same thing, it is because in reality we do not think anything".[9]
Political positions
In May 2018, Renson co-sponsored an initiative in favour of legalising assisted reproductive technology (ART) for all women (singles, heterosexual couples or lesbian couples).[10]
In 2020, Renson went against his parliamentary group's majority and abstained from an important vote on a much discussed security bill drafted by his colleagues Alice Thourot and Jean-Michel Fauvergue that would have helped, among other measures, curtail the filming of police forces.[12][13] Although the bill passed Parliament, the disputed measure was struck down by the Constitutional Council before it would have entered in application.[14]