When do interest groups target legislators to approach or lobby under strong presidentialism? This article explores two hypotheses. First, interest groups and lobbyists seek to access committee chairs with gatekeeping power, even in those jurisdictions where the executive holds (most) exclusivity to initiate legislation (Gatekeeping Hypothesis). Second, interest groups and lobbyists target legislators who introduce more bills on issues that concern them but only on policy areas outside the executive's exclusive sphere (Legislative Activity Hypothesis). We test these hypotheses with evidence from the Chilean Chamber of Deputies. We have coded and analysed 6479 lobbying audiences and over 2300 bills.