[1][2] Yaú was elected to the senate on the All Nigeria Peoples Party (ANPP) slate for the Zamfara North Senatorial District in 2007.
He was appointed to committees on Downstream Petroleum, Inter-Parliamentary Affairs, Public Accounts and States & Local Government.
[3] In February 2008, Ya’u gave his support for President Umaru Yar'Adua (PDP) against charges that he was indecisive, saying that it was necessary to study situations in Nigeria thoroughly before taking decisions.
[5] In the 9 April 2011 elections, Yaú ran for re-election as Zamfara North Senator, this time on the People's Democratic Party (PDP) platform.
[7] The case attracted international attention because it involved the intersection of Islamic and secular courts in the Nigerian legal system.