[1] He served as the Minority Leader for NDC in Ghana's Parliament from January 2017[2][3][4][5] and was succeeded by Ato Forson.

[9][10] He held that position for 8 years even whilst serving as Minister of Communications in the Atta Mills Government.

[17] During the elections that year, Even though, Iddrisu's party, the NDC, failed to recapture power from the NPP, he retained the Tamale South Constituency seat after winning by a landslide.

In the history of Ghana's politics, he is the only incumbent MP to run for primaries unopposed for 4 consecutive times.

[28] And in the same January 2025, the parliament of Ghana led by the deputy speaker confirmed his approval as the Minister for Education.

[30] The English Premier League outfit reportedly paid 17 million Euros to secure Issahaku's services from Sporting CP.

Haruna Iddrisu and his Steadfast Football Club earned 7.9 million Euros from the deal.