Curiously enough, in November 2015, Bueno joined forces with Identity and Action (IdeA), a centre-right party opposed to Renzi. Subsequently, she formed a sub-group, named after the USEI (and, later, "USEI–IdeA"), within the Mixed Group of the Chamber, along with Aniello Formisano of Italy of Values (IdV), a party traditionally affiliated to the centre-left, and Guglielmo Vaccaro of Unique Italy (IU). Right after its formation, the sub-group was joined also by the other two IdeA deputies, Eugenia Roccella and Vincenzo Piso. The USEI–IdeA sub-group was dissolved in May 2017. After that, Bueno was affiliated with Civics and Innovators (CI) and Direction Italy (DI). Sangregorio, who had opposed the constitutional reform proposed by Renzi with the 2016 constitutional referendum (Renzi lost and resigned from Prime Minister), was not willing to field Bueno again as a USEI candidate.