The most-suggested coalition configuration by party leaders was one between the VVD, CDA, D66, and GroenLinks, with a coalition between the VVD, CDA, D66, and Christian Union the second-most discussed option.[16] After first consultative talks between the VVD, CDA, D66, and GroenLinks on 23 March, the four parties agreed to begin negotiating a coalition between the four;[17] such a coalition would control a comfortable majority in the House of Representatives, with 85 of 150 seats, and a thin majority in the Senate, with 39 of 75 seats.[18] On 27 March, Schippers presented her report to the Speaker of the House of Representatives Khadija Arib, thereby concluding the scouting period, and advised that a coalition consisting of the VVD, D66, CDA, and GroenLinks be formed.[19] On 28 March, Schippers was appointed the sole informateur for the cabinet formation.[20] However, she announced on 15 May that coalition talks had failed over migration issues,[21] and submitted her final report to Arib on 16 May.[22] She was reappointed as informateur on 17 May,[23] scouting out the possibility of a coalition with the three larger parties and Christian Union, but concluded after extensive talks on 23 May that there was little reason to continue due to fundamental disagreements between D66 and CU on medical and ethical policies.[24]