[3] Manager was elected to the Senate on the People's Democratic Party ticket for the Delta South Senatorial District in 2003.
[2] In May 2009, he raised the issue of the damage caused by the continued military bombardment of communities in the oil-rich Gbaramatu clan, Warri South Local Government Area of Delta State, leading to a senate resolution urging the Committee on Defence and Army to take action.
[4] He was joined in his protest against the violence by former Senator Fred Brume, who called it "an unequal battle that is drastically de-populating several parts of the region.
[5] In September 2009, Senator Manager urged President Umaru Yar'Adua to appoint someone familiar with the region as Minister of the newly created Ministry of Niger Delta.
[6] Manager supported finding a diplomatic solution to the Joint Task Force attacks on Ijaw villages, saying war was not the right approach.