after leaving the ps along with jean-luc mélenchon to co-found the left party, marc dolez left the socialist, radical, citizen and miscellaneous left group to join the gdr group as an associate deputy before becoming a member on 27 january 2009. on 11 july 2010, anny poursinoff of the greens was elected in a by-election in yvelines's 10th constituency, defeating jean-frédéric poisson, thus becoming the 26th member of the gdr group. on 1 september 2010, the green deputy yves cochet took over the presidency of the gdr group. maxime gremetz was expelled from the group on 12 april 2011 after interrupting a parliamentary meeting about the fukushima daiichi nuclear disaster, and subsequently resigned from his seat on 16 may. cochet left the gdr group on 6 december after being designated as an mep, and was replaced by roland muzeau; this decision reflected the dissatisfaction of the left front at the decision of their ecologist partners, now known as europe ecology – the greens (eelv), to present a common candidate with the ps against incumbent françois asensi in seine-saint-denis's 11th constituency. the four ecologist deputies subsequently left the gdr group, cochet departing on 6 december to take his seat as an mep and the three others quitting on 7 december. jacques desallangre left the group on 17 february 2012.