On May 5th, 2015, forty-one, mostly anonymous women signed an open letter in the French national daily newspaper Libération, entitled “We, women political journalists and victims of sexism ...”. They explained that they wanted to denounce the impunity of politicians whose sexist behavior towards them, sometimes extending to sexual harassment, constituted a gender constraint in conducting political journalism on a daily basis, so they felt disadvantaged in the strategic news-gathering process, compared to their male colleagues. This open letter is our starting point for questioning the mediatization of sexism in politics. By what processes, under what conditions and in what context was the public denunciation of sexism exerted by elected representatives on women journalists possible? At the crossroads of sociology of journalism, gender studies and social problem construction, this research is based on an on-the-ground survey, consisting of semi-structured interviews (13) with male and female political journalists, working in various media (print, online press, radio, television) and under different employment statuses (permanent, freelance).